Can you sue someone on a forum who is trolling and or harassing you?

Asked in Pittsburgh, PA - 3 months

If your being bullied within a forum , and have requested support from that websites admits / moderators and have run into a dead end what are your legal rights . Your next plausible step would be to block that user from doing any more harm , but what if that does not work . ( I understand set user is just a normal on line bully - but when is it necessary to take this to a legal level ) Wouldn't it be considered defamation of character if they are directly trolling a topic and or comment left withing a forum if it drags on . ( what if you are very serious about having this person stopped legally or at least have their account disabled and or deleted ) What are your legal rights on an on line forum , and what can be done to stop this on line bully ?