That's a great point that a pit should be appopriate to the music. Arcade Fire pit should be nice, polite, sarcastic, wasted yet understated even when exstatic . . . until there's a perceived infraction of social mores when its ok to drop the gloves and knock some teeth out . . . you know, a pit that reflects Canada.
Maybe the answer is to require people to get licensed before going to the ga pit . . .like driving or scuba diving . . .requiring a demonstrated understanding of your surroundings, the ability to get riled up without invading other's personal space or violating conventional rules of being reasonably cool. . . . while sober, drunk, high, or other. With Pit Marshalls in hipster camo patrolling with Tasers.