Bloodysoul, I think this is the reason the RP people do not want them here.
Well, report the post and then camp the prick.
And none of this amateur camping you all seem to prefer - grab a beer, put some good music on, and spend the rest of the afternoon making the fucker corpse walk.
Make it a game to see how many times you can gank him each time he logs on, and then try to better that score the next time.
When he logs on a Level 1 alt to whine to you, merely ask him if "RP is still for faggots," and let him know you will be looking for your pound of flesh every time he logs on until he unequivocally apologizes, not just to you but to the community at large.
Oh, at first, he will laugh at you and tell you to go fuck yourself... but eventually, after about a month of being hunted down, ganked and camped, he will apologize.