dude...it's a game

grape, try not to do it again. deci, laugh a little my friend
I'm laughing while I blow the shit out of my enemies with the Artillery Cannon. To have someone interrupt that and teamkill me, on purpose, kind of drains that fun away a little bit.

What happens on jurassic park when someone blows the bridge early? they get banned. Same principle should apply...
That's Lost World you're thinking of. But yeah, I view Artillery Cannon in the same light as Booby Traps. Use them to kill enemies, its fine. Use them to kill your teammates on purpose with no enemies around...ban. Only difference is Artillery Cannon can be used more than once in the same round.