This always leads to the question of what's right and what's wrong. Ethically, I wouldn't do it unless I knew that the police sanctioned it and I was helping them. It's not that hard to go down the slippery slope of being a vigilante and being judge, jury and executioner.

In addition, for some consideration, has it occurred to some that by "hacking" (it would probably be better to say "attacking" or "cracking") someone who does child pornography or posts hatred that you may be making it impossible for the prosecution to put this person behind bars? I mean, that's really what we'd want, isn't it?

So why not notify the police instead and offer them help?