It is moronic that he thinks that informing cops about child porn on a computer he hacked would get him out of trouble, or get the pedophile in trouble - but the odds that a pedophile is going to call the police and complain about being hacked seem to be to be about where he puts them. He's not talking about "going after" the pedophile, he's talking about hacking the pedophile to have somebody to hack.
Out of curiosity, what possible laws did he break by going through a few public databases, facebook, whois data and google, and what does it have to do with computer forensics? I did this same type of thing to go after a 4chan-type troll who was attacking my blog a few years ago. and it was a joy to really effectively stop somebody who thought they were anonymous on the internet.