Bose, I know you'll chime in on this one.
Especially with the "Alcohiol rules!" thread you posted up a while ago.
I think it's the "liquid courage" that does it. Not to say that it takes courage, but I think you're more inclined to get into an e-fight after you've been drinking than sans drinking.
I had a few too many beers at my house the other night and had to restrain myself from posting. I had typed up numerous posts but never hit the reply button.