Wasn't it Ghandi that said "An eye for an eye leaves us all blind"?
I think when we deal with peadophiles we need to be careful that we are not creating them in the first place.
As has been discussed on another thread, it has been proven that carcinogenic chemicals leak out of soft drink bottles into our food and washing dettergent and other toxins has profound effects on our hormones.
Fumes pumped out of factories can damage the thyroid glands making us fat, paranoid and psychopathic.
Endless filth on television, promiscuous society, drinking, drugs, bullying and corporate greed can drive people to nervous breakdown and become reclusive - leading to bizarre fetishes.
We also create recluses with the welfare system. People don't need to go to work, have pride in themselves or get out of the house. We are breeding a world where people are pampered like the factory farmed animals that are force fed to order.
Oh, and when asked lately what he most feared, the Dalai Lama said "I fear for the welfare of chickens". Odd you may think, but animal welfare and farming are completely linked. Mad cow disease and bird flu H5N1 are both linked to disgusting, filthy conditions. Sheep dip and growth hormones get into the human food chain and alter our consciousness.
The people that the vigilantes should go for are the dirty farmers, vivisectionists and factory owners.
Maybe the ultimate solution to offenders would be like Demolition Man where the person spends 20 years in jail in just minutes of their natural life. A sort of reconditioning.