I know I sound like an idiot, but this really doesn't bother me all that much. I mean, I certainly would never throw anything on the floor (no matter how drunk and foolish i was acting). And if I was at the game, and I saw the dude who did it, I would probably think to myself, "wow, that guy is a drunk fool. He should and probably will be thrown out of here." But stories like these really don't bother me.
I want the garden to be as terrifying a place as possible for opponents. The atmosphere needs to be wild and that starts with the fans.
Of course putting any player in some sort of danger is reprehensible, and the guy who threw the thing is a fool, but honestly I could care less about a few drunks giving Boston fans a bad name. I want Boston to have the reputation of being the rowdiest fan base.