I'm NOT with you. There are people who can't handle themselves when drinking, realize this, but drink anyway. So yes, it is the person, but it is ALSO the alcohol.
Hey, I love alcohol. All different kinds. I've also been puked on by a drunk at a game, I've had drunk idiots pick fights at the game, I've had beer thrown on me at a game, etc.
The overconsumption of alcohol at games does more harm than good. If people could stay under control, it would be cool. But they can't. So it's not cool. It's the fault of these drunk asswipes that I can't buy beer in the second half! But I guess if they continually ruin the experience for others, limiting alcohol sales is the right thing to do.