...for riders [Critical Mass] emboldens them and they sometimes act out their pent up frustration and agression at cagers. Suddenly intead of having to eek your way thru traffic you are empowered by the mass....taking an intersection, raising your bike over your head and bellowing is an agressive act. It's not a violent act, I don't think anyone who does those things really wants to hurt cagers, but it is confrontational. Each CMer decides if they want to do that, but as a group we have to deal with the consequences.