No. It is the alcohol. In my experience it is an addictive substance that makes everyone intolerable. Everyone that drinks... everyone... says 'No no. It's not me. I am a responsible drinker. It must be everyone else that is the problem'. That is a telltale sign of a big issue with consumption.It's the person, not the alcohol. Many, many people know how to drink responsibly and enjoy a few. I personally enjoy a nice glass of wine or a good craft beer or two at times. I like having a Bass Ale from the Rose and Crown while watching the best nighttime spectacular ever created (Side note: ). But I never have so much that I am stumbling all over the place, especially in a place like Disney. In my younger days, even when I did occasionally get that drunk, I was never violent. It's not in my nature.
Alcohol doesn't cause anyone to do anything. It brings out other aspects of their personality. Ban the idiots, not the alcohol.
Ban all the alcohol for life from Disney parks. Every guest will be better for it.