Critical mass doos and donts?

Advocacy/eh? Advocating hatred of cyclists?
Fun/frustrating
Slow/see above
Peace/no- lots of aggression
Noise/this is a positive?
Lack of motors/Loads of motors, queued up and furious
Pedals/well, yes
Smiles/not from all the people who have abruptly had their Friday night FUBAR'd by cyclists
No Dammit/I'll give you that one

Honestly, CM generates more hatred of cyclists than anything, it's a crazy act of self harm.