I've noticed that one of the best ways to get rid of people like this is by simply remaining unaffected ( emotionally ) by the attacks.
Most people who have been online for a few years knows how it feels to run into nuts who want to do them harm... And most people can spot abusers like this because of their own experiences.
If you know who it is, then it could definitely be worth calling the local police office and see if they care, just like Kyhle suggested.
From a d2jsp perspective, there are plenty of moderators to explain your situation to!
