[RKromwell]

Huh...

Loot aside, I figure what he was doing is an exploit. You have charmed a mob. You cannot heal that mob but know if you don't do something, the next spawn will kill your 'pet'. SO, you zone out. Mob loses charm right away and the un-natural healing they do when not being affected by a player kicks in. You zone back in, YAY to fully healed npc tank. Wouldn't it have been faster to camp out and come back in game right away?

You are taking advantage of the system by zoning out.