Mile Zero is the personal website of Thomas Wilburn. All statements and opinions here are my own, and do not represent the views or policies of my employers at Congressional Quarterly, Ars Technica, or other publications.

June 17, 2009

Unity Is the Problem

There's been a cycle between client-server and peer-to-peer as long as there have been computers. We've been stuck in the former for a while now, as AJAX and web browsers became the new "thin clients." Opera's newly-announced Unite technology is a hint that we might be swinging back: it embeds a JavaScriptable web server into the browser, turning the thin client into a server as well. Opera hopes this'll be a return to the ideals of a decentralized, peer-to-peer web. I don't know personally if they'll be the ones to do it--we're talking about a company with an x86 market share that's practically a rounding error outside of Europe--but I think it's an exciting move in the right direction. Mostly.

Granted, Opera's not the first company to try this. They're not even the first Scandinavians to do it: I wrote a while back about Nokia's Mobile Web Server, which does something very similar using a dynamic DNS service and ports of Apache and Python to S60. It's kind of funny, actually: even when I wrote that post, I thought a lot of the applications I proposed--data collection apps, location-aware multimedia blogs, peer-to-peer REST APIs--might be a little far-fetched. Now you could practically drop my post into Opera's Unite pitch without changing anything other than the brand names. It'd blend right in.

Given my interest in digital activism, the first thing that came to mind was the usefulness of this technology for dissidents. Sadly, Unite suffers from the same problems as most Web 2.0 communication technologies: its idea of decentralization, isn't. In repressive environments, that makes it potentially vulnerable.

Opera claims that Unite is decentralized--and it is, to a certain degree. In theory it moves user data away from repositories like Facebook and Flickr, and leaves them on your individual machine. But in reality, Unite simply moves the centralization into the network channel itself. Despite the claim of creating an "interpersonal web," the service doesn't actually connect users to each other directly. Instead, to handle the problem of addressing dynamic servers, as well as providing some degree of security, all Unite traffic goes through Opera's proxy servers and is routed to its actual destination.

Having a proxy server, of course, is not a bad idea. For activists it might even make a lot of sense: it adds a layer of obfuscation, and means that the data server can't immediately be physically located via its IP address. And Opera has a lot of experience in proxy technology: its Java-based Opera Mini browser provides a fantastic web experience on resource-constrained devices by running page requests through a proxy that compresses them. I don't use it for anything secure, but it's astonishing how much faster it is for basic reading compared to a full Webkit mobile client. Opera probably also has a way to monetize the Unite accounts required to use its service, and which serve as the subdomains for users.

In a repressive environment, however, this strategy is disastrous. Take China, for example: you may have heard that a few weeks ago, on the anniversary of the Tiananmen protests, China simply shut down Twitter, Facebook, YouTube, Flickr, and a number of other social networking tools. For all its talk of decentralization, Opera Unite could be shut down just as easily, simply by blocking access to unite.opera.com. Suddenly that "interpersonal" web collapses. Likewise, if anything goes wrong--or if Opera caved to governmental demands--any traffic moving between Unite servers through their proxy would be vulnerable. So much for security.

Granted, not every regime is as competent--or as concerned--as China when it comes to ICT. We're all aware of how Twitter (among others) has become a part of communication in and out of Iran. Why hasn't it been shut down? As Evgeny Morozov argues, it may simply be a matter of priorities: when you've got real riots in the streets, riots on a microblog service probably seem relatively inconsequential--probably are relatively inconsequential, being more useful for publicizing protests than for actually organizing them. My cynical side also notes that (if they've thought about it this far) Iranian authorities may see an advantage in allowing the rest of the world to see this as a dramatic electoral struggle, rather than merely a dispute between two Shah-chosen figureheads--but then I know nothing about Iran, and you should certainly take my opinion with a ton of salt.

Despite my doubts, I think a Unite-ish system could be very useful for activists if combined with a user-run proxy system. It makes information dissemination flexible, simple, and mobile: as easy as sitting down near a wireless hotspot and opening up a browser. Adding some kind of discovery mechanism for the proxy--maybe via a distributed, browser-based darknet--or a process for spamming its location to blogs/e-mail/messaging when online would make this a powerful way for activists to share their data without giving up ownership to a third party. There's no reason Opera themselves couldn't lead the way on this, based on what they've done with Unite so far--but it looks unlikely.

March 9, 2009

Good Reads

I keep adding "New Protest" feeds to my reader, in the hopes of eventually studying the topic for a graduate degree. Here's a few of the interesting blogs on the topic that I've found lately, although the list is always growing.

February 20, 2009

Bay Leaves

Pirate Bay Testimony knock-knock jokes probably aren't going to catch on:

Knock knock!

Who's there?

The Pirate Bay.

The Pirate Bay who?

We don't know!

If you don't get it, well, that's kind of the point. Ars reports that the Pirate Bay's legal strategy has taken a turn for the bizarre: when questioned about who owns the site, whose name is on the contracts, and who wrote their public material--in short, who bears the responsibility for the all those torrents--they basically insisted that the answer is "nobody."
The prosecutor kept trying to pin [Pirate Bay staffer Gottfrid Warg] down on who ran the site, how it was organized, and who paid for (and received the revenue from) site operations. Warg kept insisting that the project wasn't a "top-down" business, but that interested users volunteered time and effort to make different pieces of it work. The prosecution appeared not to believe this and continued asking questions to tease out the relationships between everyone involved. Warg continued to insist it was a "loose project"--even the moderators who took down material that didn't match its stated description were volunteers.
Now, like the prosecution, you may believe that the defendents are lying. After all, it's not like they've shown any other signs of taking the trial seriously, treating it instead as a combination of publicity stunt and performance art. But the fascinating possibility--one that has intriguing implications for social movements--is that they're not lying at all. It's entirely possible that their site really isn't "run" by any particular people in the sense that we normally think of the word. And far from being a weakness, this is a tremendous advantage for them.

It's not a coincidence that The Pirate Bay's raison d'etre, BitTorrent, gets its power from massive, distributed parallelism. From Google's Map/Reduce (which splits enormous tasks across equally enormous datacenters), to the multi-core processors that have become commonplace, to BitTorrent's use of "seeds" to spread files across networks, parallelism is one of the biggest advances in computer technology for the last five years. I'd argue that it also carries similar implications for social movements.

Start with the basic idea of organizational decentralization and open-source organizing. Could an operation like The Pirate Bay be run without central leadership, as the defendents insist is the case? Absolutely. For a digital community, moderation and management can certainly be split into a set of distributed actions, carried out by autonomous actors that coordinate via software and modern communication tools. That's one of the secrets behind the Obama political effort: instead of directing all efforts from the top down, it granted a high degree of autonomy and initiative to middle levels of the organization, and reserved the upper layers for support and communication--tasks that were, whenever possible, automated. It wouldn't be hard to design or cobble together a simple system for distributed, consensus-based decision-making. At that point, who's responsible for the movement? In a sense, everybody is. In another, as Pirate Bay staff claim, nobody is.

The decentralization of (nonviolent) social movements is not a new idea, but in the distribution of agency we begin to see how it creates an asymmetrical approach that gives the authorities fits. The prosecution in the Pirate Bay case has found themselves frustrated when their targets stand up and engage the legal system on terms prosecutors can understand. It's unlikely that this is a sound legal strategy for the defendants, but then civil disobedience rarely relies on legal reasoning. Nonviolent tactics are inherently based around the idea that it's foolish to engage the opponent where he is strongest (i.e., through violence and forceful coercion). Distributed parallelism extends this idea further into the political sphere, by removing the known pressure points that authorities might normally use to control organizations.

Consider: if a social movement has leaders, they can be discredited, bribed, jailed, or otherwise influenced. But if (from the perspective of the authorities) it doesn't have any, there's no weak place to apply power against the movement. If it has a structure, that structure can be disrupted at its links--but if each member is a peer in the network (and, to borrow BitTorrent jargon again, they're capable of seeding new political action), then each one has to be disrupted individually. In addition to its value as international legal comedy, this is clearly a powerful development in social movements, one that's made possible by new networking innovations.

Even in organizations that retain a central leadership structure, the advantages of distributed action are hard to deny. Consider a movement that has its own version of Amazon's Mechanical Turk service, which provides a marketplace for piecework. If the movement can break even just a few menial tasks (call lists, processing organizational data, collecting data) into bite-sized parts and pass those out to volunteers, it not only frees up staff for more creative tasks, but it gives a large number of people a chance to work for--and identify with--the organization. Since movements derive their force from the sympathetic bodies that they're capable of motivating, that identification, however slight, is a powerful thing.

Undoubtedly, there are also potential drawbacks to the distributed approach. The most obvious of these is the difficulty of forming and maintaining consensus--how does the movement bargain? How does it develop a plan of action? When does it decide to stop? If anything, I suspect that these are problems that arise from "too much of a good thing": what activist wouldn't want to be faced with the challenge of directing a massive, widely-spread, perpetually-restless populace? Besides, the problems of coalition-building have always been at the heart of political action (it makes up a significant portion of Randy Shaw's Activist's Handbook, for example). Ironically, one scenario for distributed activism comes from fourth-generation warfare theorist John Robb, who has written about what he calls "open-source warfare," or a network of insurgent groups that work separately but coordinate effectively when their goals align (I must note that I see 4GW theory, with its emphasis on asymmetric conflict and bottom-up organization, as armed conflict finally catching up to nonviolent political theory). In this model, it's true that coalitions are transient--but they form with dizzying rapidity when a common goal is found.

In short, there's tremendous power in applying distributed parallelism and decentralization to social movements, and not just as a fanciful legal strategy. We're just starting to see the potential applications of this kind of organizing model. Although the Pirate Bay defendants seem to have hit on their courtroom gambit as a media ploy, there's no reason we have to treat it as a joke.

January 22, 2009

Protest and the Distribution Problem

Let's say you're part of a social movement in an authoritarian country. You're not even a leader--just a participant, albeit an empowered and adaptable example (perhaps your movement doesn't even really have leaders, per se, as many spontaneous protests don't). It's in your best interest, as well as the best interest of your organization, that you be able to communicate quickly and effectively with other members, probably using some kind of moderated broadcast network. Normally, you'd use one of many Internet services--Twitter, e-mail, blogging, etc. But of course, living in an authoritarian regime, it's not that simple.

It's not that you need to use a channel for confidential communication, since if you've read your Gene Sharp you know that excessive secrecy is as much a liability as an advantage. And you don't need it to be capable of high-bandwidth miracles: reliability and technical compatibility are more important than rich audio and video or message length. What you do need is complete decentralization. And that's the rub, because I can't find any software solution to that particular problem.

Decentralization is important because centralized resources are vulnerable. They can be censored (see: China), hacked, or hit with denial-of-service attacks (see: the takedown of Estonian and Georgian government sites). A dissident under authoritarian rule can't count on services vulnerable to these attacks--they can't even necessarily count on the infrastructure on which those services are based, since it's likely controlled by the authorities as well and could be targeted or cut off completely (see: Burma's disruption of all Internet access in 2007, or China's ability to censor SMS messages based on content).

Barring the total collapse of the underlying infrastructure (but not excluding scenarios in which it is heavily filtered or isolated), what's needed is effectively a peer-to-peer network. This is not, unfortunately, something on which web trailblazers have been concentrating. After all, the advantages of Web 2.0 have been fueled in part by centralization (at least from the point of view of the client). Google may be massively decentralized on its backend through the application of map/reduce programming, but the front end is useful to people because of the data shared across *.google.com. Break the connection to that domain, and we don't just lose GMail: there goes all the remotely-invoked JavaScript, code mashups, and programs built on Google Apps. That's a lot riding on a relatively simple point of failure, which would be better served by moving to the edge and using lots of redundant mirrors. Indeed, this is exactly what Chinese dissent bloggers have been forced to do.

Take a less extreme example: e-mail and IM. E-mail is not what we would typically think of as "centralized." Anyone can set up a mail server, or rent one, instead of using the big webmail providers. And all of those servers can talk to each other. But in the end, they're a client-server relationship that usually has to remain stable over time if they're to be of any real use--i.e., people can't just change e-mail addresses constantly, leaving them vulnerable to attack on the hosting server. Even if they did change addresses regularly, perhaps using a mailing list to maintain connections, it only moves the vulnerability to the mailing list. There's an implicit assumption that something is going to act as the coordinating hub--an assumption shared by even the most decentralized IM network, Jabber (or its federated microblogging counterpart, laconi.ca). It takes more effort to shut down or censor a multi-server network, as opposed to one sitting under a single domain. But it's not an impossible task by any stretch of the imagination.

What you, our anti-authoritarian dissident, might find really useful is a kind of ad-hoc mesh network--one that discovers nodes nearby and synchronizes to the latest data available. It doesn't have a central server. There's no addresses or domains that could be shut down. Some networks like this do, in fact, exist: Gnutella can be run as a strictly peer-to-peer setup, and BitTorrent has support for a trackerless system using distributed hash tables. We'd have to solve problems of reliability and speed, but at least it's a lot harder to shut this down.

But wait: haven't we just moved the problem around again? Now we have a peer-to-peer channel for transferring information without relying on vulnerable central transfer points, but now we have to make sure that the information itself isn't being altered or tampered with as it makes its way across the mesh. Maybe we could sign messages with an encryption key, so that their author can be verified. Better hope that the private key never falls into the wrong hands--and how do you get the public key out to people in the first place? Any given security solution is only as good as its weakest link--and the weakest link in social movements, I think, is never the communication channel itself, but the people who run it.

There are probably lots of other issues undermining the idea. I'm not a security expert, and already this is seems like an increasingly complex problem. When faced with a technological spiral like this, I sometimes find that the solution is to step back and rethink the problem itself--especially since this solution is probably way too complicated for typical users restricted by technical know-how and budget.

I'm reminded instead of a post at Perspective 2.0 that imagines the process of writing physical letters as an adjunct to information technology--another layer in the protocol, so to speak. It's easy to get captured by the glowing promise of ICT in democratic societies, and from there spin off into a dreamworld where protesters coordinate over an open-source Twitter clone via their smartphones, but that's just not realistic (or possibly even desirable). But the lessons of organizational communication are conceptual: they can often be back-ported to other, less-efficient media. So maybe the question isn't how to bring social protest to the Net, it's how to bring the Net's security innovations (including decentralization and peer-to-peer communication) and bring those over to the movement.

January 19, 2009

Because Injustice Is Here

"We have waited for more than 340 years for our constitutional and God-given rights. The nations of Asia and Africa are moving with jetlike speed toward gaining political independence, but we still creep at horse and buggy pace toward gaining a cup of coffee at a lunch counter. Perhaps it is easy for those who have never felt the stinging darts of segregation to say, "Wait." But when you have seen vicious mobs lynch your mothers and fathers at will and drown your sisters and brothers at whim; when you have seen hate-filled policemen curse, kick and even kill your black brothers and sisters; when you see the vast majority of your twenty million Negro brothers smothering in an airtight cage of poverty in the midst of an affluent society; when you suddenly find your tongue twisted and your speech stammering as you seek to explain to your six year old daughter why she can't go to the public amusement park that has just been advertised on television, and see tears welling up in her eyes when she is told that Funtown is closed to colored children, and see ominous clouds of inferiority beginning to form in her little mental sky, and see her beginning to distort her personality by developing an unconscious bitterness toward white people; when you have to concoct an answer for a five year old son who is asking: "Daddy, why do white people treat colored people so mean?"; when you take a cross county drive and find it necessary to sleep night after night in the uncomfortable corners of your automobile because no motel will accept you; when you are humiliated day in and day out by nagging signs reading "white" and "colored"; when your first name becomes "nigger," your middle name becomes "boy" (however old you are) and your last name becomes "John," and your wife and mother are never given the respected title "Mrs."; when you are harried by day and haunted by night by the fact that you are a Negro, living constantly at tiptoe stance, never quite knowing what to expect next, and are plagued with inner fears and outer resentments; when you are forever fighting a degenerating sense of "nobodiness"--then you will understand why we find it difficult to wait. There comes a time when the cup of endurance runs over, and men are no longer willing to be plunged into the abyss of despair. I hope, sirs, you can understand our legitimate and unavoidable impatience."

     --Dr. Martin Luther King, Jr. in his letter from a Birmingham jail

They called his actions unwise, and untimely. They referred to the marches as "extreme measures." They asked him to observe the principles of law and order. Most of all, they called him an outsider, as if to question why he had come in the first place. And he replied, "I am in Birmingham because injustice is here."

To this day, I sometimes meet people who ask why he couldn't simply shut up and go through the proper channels, as if the problem was just a clerical error that needed to be addressed. It astonishes me. King answered those questions more than forty years ago, and yet there are people still asking. We have come a long way, but we have a long way to go.

As always for Dr. King, the letter itself is a lovely, powerful piece of writing. If you're lucky enough to have a day off in celebration today, consider taking a few minutes to read through it one more time.

November 10, 2008

A Change You Can Haul Away

Well, the election's over. Commence endless speculation about how the Obama presidency is doomed, and will never be able to enact its socialist agenda! Will he govern from the left, or the center? How will he deal with the train wreck that's been left waiting for him?

Now I'm just some guy who works in the city, but I have a suggestion for DC's soon-to-be resident-in-chief if he wants an easy, yet bold, policy fix: get rid of the gigantic concrete security barriers surrounding the White House and blocking off Pennsylvania Avenue.

For those who don't live near the district, here's what I'm talking about:


Image by flickr user Daquella manera, used under Creative Commons license

According to Wikipedia, these kinds of concrete blocks--also known as Jersey barriers--were originally invented to minimize the chance that car accidents would cross lanes into oncoming traffic. But if you live or work in DC, you're probably used to seeing them surrounding almost every landmark in the city, as the Wikipedia article drily continues, "as a means to keep car bombs away from perceived targets."

If you see enough of these things--and that's easy enough since they are, literally, everywhere around here--it's easy to become desensitized to them. But take them out of the blind spot for a second and think about what they mean. The ubiquitous Jersey barriers are not just ugly breaks in the landscape that ruin tourist shots of DC's buildings and monuments. They're the physical embodiment of our fears. Each of those barriers is the end result of a train of thought that began with the assumption that our government is under attack from shadowy figures, and ended with fantasies of kamikaze car bombers. It's the same kind of bureacratic panic that leads to the TSA's mindless inspection theater at the airport, checking for high-tech bombs and guns even though the 9/11 hijackers carried nothing more sophisticated than boxcutters.

Now, I've heard tell that once upon a time you could actually drive past the North lawn of the White House on Penn, or the South lawn via E St, but that hasn't been true since I've lived here. Any attempt to do so is blocked by those concrete barriers and police cars. They're even layered--behind the first set, along the fences that already surrounded the building, there's another row of squat, white blocks. For a country that champions its system of representation, the effect is profoundly distancing. Pedestrians are allowed through, but you can almost see the hesitation as they cross the invisible line dividing city from citadel.

You can grow to ignore those barriers, as most of DC's regulars do. But I believe that the fear underlying their placement is not so easily ignored. It forms a pervasive atmosphere of paranoia. I don't know what that means in terms of influence, but it seems hard for me to believe that it has no effect on our policy, and it certainly impacts our image with visitors. Like airport security, the result of so much ritualized watchfulness only seems to breed more fear.

On the other hand, you can do what the Bank did, and disguise the barriers. Visit 1818 H Street today, and you won't see concrete around the World Bank Group buildings, but you will see a series of thick metal posts sunk into the concrete for the same purpose. If anything, this approach is even worse, because it institutionalizes those fears, planting them permanently in the ground, building up paranoia as infrastructure.

No, I don't think these are options that respect the dignity and the openness that lie at the core of American democracy. I don't think they represent us well. And frankly, I don't think they're necessary. Whatever results from the next four years under the new administration, there's no simpler symbol of hope and change than the removal of the barriers around the White House, if not the rest of the capital, to let the people through.

November 4, 2008

Dog the Vote

Lines in Arlington were short this morning--much longer at 6am, I heard the poll worker say, but by the time we go there at 7:30 it only took about half an hour. I used a paper ballot and Belle used the machine. We're trying to make Diebold work twice as hard to throw the vote.

Wallace, obviously, does not actually get a vote. But if you give him a sticker, he doesn't know the difference.

September 22, 2008

Bailing Out the Boiler Room

As Congress considers spending $700 billion to bail out irresponsible (and often fraudulent) lenders, I'd just like to draw people's attention to the Columbia Journalism Review's lengthy essay on the topic, which performs two roles: it's perfectly readable, and it gets to the heart of the systematic corruption and neglect behind the crisis.

Conventional wisdom says that the mortgage crisis is a hard story to cover, since it's based in a lot of esoteric debt-trading transactions. But as the CJR points out, that's a clear case of not seeing the forest for the trees. At the most basic level, this is not a complicated narrative: due to a lack of regulation, investment firms created pressure for lenders to take advantage of homebuyers by extending them loans that they couldn't hope to repay. It's a classic American story of big businesses screwing over the little guy. That it has largely been presented as some kind of vast, nebulous market failure reflects, I think, an incredulity of the press to believe that the situation could actually be that corrupt. One would hope that it's finally becoming clear.

August 5, 2008

Why Oh Why Can't We Have A Better Economic Overclass?

or: They Teach the Children of California

It was annoying, but not dramatically so, when Brad Delong decided to deride a perhaps-misguided professor who, teaching a class on globalization, urged his students to consider the abusive practices that might have produced the goods they buy:

Yet he keeps buying them anyway because he has "a mortgage and child-care expenses." A stupid little Nietzschean wannabe who eagerly indulges in what he believes to be grave moral turpitude in order to save a few bucks.

It is probably very nice to live comfortably, as DeLong does, where the greatest consumer dilemma on the horizon is whether or not to buy a new iPhone. Many people, however, are not in a situation where they can afford to choose between their morals and their checkbook. Even considering that the "stupid little Nietzschean wannabe" is probably misinformed about the degree to which child and slave labor are employed, the invective still seems a little harsh and out of place.

But his insistence a few days earlier that "if you do not feel the force of [Milton Friedman's] grand argument, you need to think again" is somewhat more galling, particularly given the quotation he provides from Friedman himself:

The United States today is more than 50% socialist in terms of the fraction of our resources that are controlled by the govern ment. Fortunately, socialism is so inefficient that it does not control 50% of our lives.... The really fascinating thing is that our private sector has been so effective, so efficient, that it has been able to produce a standard of life that is the envy of the rest of the world on the basis of less than half the resources available to all of us.

As far as I have ever been able to tell, Friedman's "grand argument" has always basically amounted to sheltered, fanatical free-market boosterism. If all it takes to have a grand argument is to equate some kind of ideological principle directly to vaguely-defined terms like "freedom," then we can all have equally grand arguments, I suspect. And ponies. Speaking personally, I get better grand arguments out of cereal boxes.

But perhaps what has annoyed me most was the post which started it all, DeLong's glowing recommendation of a hit-piece on University of Chicago employees who had the temerity to object to the formation of a Milton Friedman Institute. It's a chunk of writing that, I kid you not, relies on deriding the term "global south" and accusing the writers of attending "fashionable lefty cocktail parties in Venezuela"--in other words, why do these filthy commies hate freedom? And then it tries to claim that China (!) is a fine example of Friedman's free market principles at work.

It's increasingly clear that the quality of my feedreader will be dramatically improved by removing Brad DeLong, and adding in his place Daniel Davies at Crooked Timber, who writes:

China has done very well out of managed opening of its markets and out of introducing capitalism into its domestic economy, but it hasn't followed anything like the kind of policy agenda that's described by neoliberalism, and it's still a very unfree society in political terms. [...] If Cochrane [the original author] is representative of the University of Chicago economics faculty (he says that he's speaking purely for himself, but he seems to have gathered widespread endorsement), and we're to take seriously the idea that the recent history of China is something that the proposed Milton Friedman Institute will be endorsing, analyzing, etc, then that's quite a radical reassessment of the fundamental political basis of Chicago libertarianism.

... I've no idea why so many people are calling it a 'fantastic polemic' -- you could click randomly on a list of right wing blogs and have at least a 50% chance of finding a better cliche-ridden philippic against those terrible left-wing academicessess. I suspect it's the Milton Friedman Reality Distortion Field Generator, the same strange psychophysical device that makes people believe that Friedman was a principled opponent of the PATRIOT Act and never really knew what Pinochet was planning when he recommended that trade union rights should be removed. The MFRDFG is powered by fifty per cent fear of being redbaited and fifty per cent disdain for dirty fucking hippies, and I'd regard it as a harmless intellectual defence mechanism if it didn't generate industrial pollution in the form of toxic criticisms of JK Galbraith and/or Paul Sweezy.

Indeed. I worry about the school of economic thought that insists on opening markets at the expense of anything and everything else. It seems to me like the kind of thing that can come only from an ivory tower--and reminds us that ivory is a bone often forcibly harvested from its former owners.

July 15, 2008

Moon Festival

From The Methods of Nonviolent Action by Gene Sharp, quoting from Edmund Stevens (1967):

...each morning an entire platoon of Chinese soldiers would march out on the ice and lowering their trousers train their buttocks towards the Soviet side, the ultimate in Chinese insults. This exercise continued until one morning just as the Chinese assumed their positions the Russians set up large portraits of Mao facing in their direction. The Chinese hastily covered themselves and retired in confusion. There were no repetitions.
Sharp includes this under discussion of nonviolent method #30: rude gestures.

Future - Present - Past