There doesn't seem to be a specific section for player reports, so I'm going to leave it here.
Characters involved:
Monkeyrun 60 Human Rogue
Bananapple 59 Human Priest
Bananarun 37 Human Rogue
This person was triple boxing while heading south through The Barrens. He was found ganking and camping flagged players while clearly switching between his own game clients to deal extra damage, use aoe fear, and shield+heal himself. I have recorded a short video to showcase his aggressive behavior while multi-boxing on Nostalrius.
https://youtu.be/lDJKfhwF4VE
And here are a few screenshots, including a /who search that I took shortly after that showed where he was heading in the first place; Razorfen Downs, no doubt to boost himself through the dungeon.
http://imgur.com/a/5PCRF