Then people have the nerver to have a go at punk and metal clubs saying they're violent! At least they know we're going to go nuts and get pissed at metal/punk gigs so they don't serve us glass containers in case someone has a bit too much and starts a punch up. Of course if someone does start a punch they usually get a severe kicking from everyone else for being a complete prick and spoiling everyone else's fun, that's before the bouncers/security get a chance to chuck them out!
You pack a room full of d-list celebs with less talent than a squashed spud, chuck in some coporate sponsorship, invite a load of yobs on the lookout for some cheap "happy-juice" served in glass containers of all thing, nope can't see why that ended in near tragedy!