Columbine forced public school adminstrators to finally pay due attention to bullying. Investigators cited student body testimony that Eric Harris and Dylan Klebold had themselves been the frequent victims of schoolyard stooligans.
When you get blue balls from a girl who's been teasing you, so you yell out "I'm fucking tired of this shit!" while ripping off her blouse and revealing the nipples you will then suck dry. Bonus points if this takes place in your car while parked at a church with the girl's sister in the backseat.