[mthoms]

Now, now. Let's not go vigilante. There's a site dedicated to that stuff if the OP is interested. It's called Reddit.

Edit: By the downvotes, I see that apparently HN is not above internet mob justice. My mistake, carry on.

[wizard_2]

I can tell you first hand the police don't have the manpower or knowhow to track people on the internet. They're good but they need help.

[dwwoelfel]

It's only vigilante justice if someone illegally punishes the criminal. Helping the police locate a suspect is called "being a good citizen".