1) Learn all you can about tear gas and what to do when you are in a cloud of it. 2) If you get arrested, say NOTHING until you have a lawyer. 3) Carry nothing to the demonstration that could possibly be perceived as a weapon. 4) Learn the position to take if you intend to be non-violent and are going to be beaten. 5) Do NOT resist arrest. That's a sure way to get yer head split open. 6) Thank you for this. I expect to be arrested at the next economic summit that's held in Canada, and I too will take the advice above. Been there; done that; gonna do it again.