I think it can be used for organizing people for protests, too. Of course when you make it "public" you risk being infiltrated, and the FBI knowing your plans, but at least they won't know who you are - unlike doing the same thing over Facebook or e-mail or whatnot - so they can't arrest you before you even go to the protests, like they've done to some Occupy leaders.

Please stop spamming this comment around. We get it, it's a cool app but that doesn't give you free reign to spam it.