Ummmm, yeah.... who is going to win? A 3000 lb automobile or guy on a 30 lb bike?
Don't get me wrong, i am all for peaceful bike protests such as critical mass back in the day. Back then I would participate every month here in San Francisco before the huge blow up in the late 90's where the cops arrested hella people. But, if a car is on my ass i'm going to get out of the way.