As someone who was recently groped by a drunk fuckhead (a friend of a friend), I can relate. While not at a sports event, it was at a bar. I think the common denominator here is: booze.

Man I was fucking pissed. Especially when I was told by his friends that I should take it as a compliment. These guys were in their mid-30s by the way. And professionals who went to Ivy Leagues. Sexual Assault, it knows no socio-economic bounds.