As ye sow...
I'm not necessarily condoning this, but I wouldn't shed a single tear if I read about a lot more of this type of vigilanteism.
Yup, they are only reaping a small % of the pain, fear and depression that they have bestowed upon the victims of their deviant behaviour.
They need to fear for their lives daily, they should open a hunting season on pedophiles, $500 per tag. I'll gladly take 4.