I love people who support vigilantism.
I remember the mentally handicapped guy in Dallas who moved into a house where the previous renter was a convicted sex offender.
Some "heroes" decided to exact some justice and found the info on one of those notification websites done by the state.
Well guess what? They beat the living shit out of the wrong guy.
http://www.unc.edu/~sblawing/topics/vigilante.html