Look at the bald headed cop at the tail end of this video, he actually was surprised they sprayed and probably said, "fuck that idiot almost hit me.."
Anyhow, unless you take a gun to a knife fight you are fucked. These people are wasting their time unless they want to get really violent. Peaceful protesting is like putting your face in a blender, it doesnt really work. Better then nothing I guess...or is it?