For once I am 100% with Anonymous - and note that this is not Shallonymous of Scientology fame (these are too busy fighting imaginary enemies to do any such good in the world) - these are the original 4chan anons. This guy was torturing cats and published his deeds on Youtube. Anons tracked him down and within 24 hours got him charged.
WELL DONE ANON!
Kenny Glenn The Animal Abuser - Encyclopedia Dramatica:
"Quicker than you can say Chris Forcand, Anonymous was able to track down the perpetrators, alert the local authorities and get the fucktards in custody after the local police verified that Anon's crack detective team were indeed, right on the money. Dusty the cat was liberated and turned over to a local vet for a check-up and some catnip and maybe even some pussy."