Oddly enough, the only times I've had trouble with bouncers being dickheads is at decidedly non-metal shows. It's never happened to me, but it's happened to my friends and people around me.
The Modest Mouse show I saw a few years back instantly springs to mind.
07/22 - Melt-Banana
07/26 - Forever Came Calling & Primitive Man
07/30 - Warped (?)
08/05 - Knockout Kid
08/07 - Fireworks (?)