I live in Chicago and a whole bunch of Occupy protests are happening on my block, so I've been grabbing some fantastic B-Roll of angry mobs and police on horses lined up in the middle of broadways and other really great stuff.  I figure that kind of thing could be useful for a zombie apocalypse short or something. 

My question, now that I have this awesome footage, is whether or not I can even use it without consent forms. 

Granted, they're all hippies and probably couldn't afford lawyers, but just in case...