As I have posted before, just because you think you are anonymous online don't make it so. Anyone with enough resources can track you down and nail you to the wall, legally. Someone close to me did just that. Boy did the offending parties sh*t their pants when they recieved the papers.
If the CIA can track down an Al Qaeda member using a computer in a cave half a world away, using encoded security systems, you can track down some chucklehead farting around on a harness racing site. When you mess with peoples reputation, business, and family you deserve to get your ass burned to the ground. Karma is a bitch!