Critical Mass Bicyclist vs. the NYPD

This happened just a few days ago, bringing more light to the tension between Critical Mass and the City. While the cop was wrong - the bicyclist didn't seem to do anything even remotely questionable in the video - I'm hearing that many of the other cyclists involved in those events are quite obnoxious. From reading people's comments about this I'm gathering that they're a big obstruction to traffic. Purposely.

Now, I've yet to actually encounter a Critical Mass event in progress and I think that the idea of a whole bunch of people getting together to ride is a great idea. However, if you purposely get in the way of the masses in an unorderly manner, it makes me sort of wonder if I should even listen to your group. No matter how important your message is.

So what do you guys think of what happened? Ever got caught up in one of their get-togethers and/or find them as annoying as other people do or do you agree with their methods?

Update:
After looking around youtube some more I found this video from an arrest during Critical Mass in 2004. The video is fairly intense, so watch at your own discretion. But believe that it will help to fuel the conversation in the comments.