The worst punk I ever dealt with was a fundamentalist Christian who was the most hateful person I've ever interacted with online. Punk wouldn't leave me alone. And for those wondering - I tried to turn the other cheek & let it go but he stalked me.
I got even, though. I learned his real name and collected some of his less than Christian posts and found a picture of him online. I then sent him an email and told him he had 24 hours to cough an apology or he would wish to God that he had. He talked more smack and two days later he woke up with a blog dedicated to him and featuring his venomous hatred. Picture, name, everything.
I even gave him another chance and told him I'd take the thing down if he'd simply apologize. He threatened to sue, so I posted that as well. He never did apologize.
But he never bothered me again, either.