Wow, it amazes me that you people seem grossly unaware that there has long been a worldwide anarchist movement - this type of thing is nothing new.
The vast majority of liberals - especially here in America want NOTHING to do with these people - these people undermine liberalism. They're more like free liberatarians, but without anything even close to a reasonable plan. (Not to say that free liberatarianism is reasonable, but at least they try)
I wouldn't worry too much 'bout they're attack on Wall St. - Manhatten is a fortress. Since 9/11, it's possibly the most secure and controlled place in world.
P.S. I've been friends with several NYC cops, great guys, but DO NOT EVER PISS THEM OFF!