This is pretty typical of him:

You tell Rengorm 'Hahahah'
Rengorm tells you 'Against five scions an' five nightwalkers.'
You tell Rengorm 'Hahahahha'

While this might be confused for an acceptable thing to 'tell' IC for an orc, this is actually a trademark griefing tactic used by the player behind him. It generally goes like this:

1) Griefer In Question does something of questionable taste, generally related to being a "bad winner" or calling in his OOC buddies on AIM.
2) Whiner A calls Griefer In Question out on his poor behavior, usually in anger.
3) Griefer In Question then seizes the opportunity to sink his griefer teeth in and attempts to enrage the Whiner further through tells, IRC, multikilling, and using alt characters and AIM buddies.
4) Other people's misery gives Griefer In Question an erection.

Long story short, this is one of the least pleasant people in the game to be killed by if you're easily angered. I'm sure he's fine the other 90% of the time.