Originally Posted by Mango

Of course it would be best to get ahold of his/her/their identity and get the necessary done, but the sad truth is that they are hiding - plain and simple. They use sophisticated techniques like proxies, hacked servers or PC's and what not in order to create a path that can hardly be followed by anyone... And ultimately it may turn out that he/she lives in a country that doesn't give a damn about these practice or is corrupt, and then you get back to the start.

Very sad, indeed, but I'm not sure if anything can be done about that...