I was at the lv 63 dungeon, as a drk, with two friends and a random dragoon who told me to pull big. I told him no and proceeded as normal. During one pack of 3 mobs, he proceeded to run ahead, body pull the next pack, and lead them back to us. I told my friend to use only single-target skills against the mob I pulled, and not to touch the ones the dragoon pulled. I also told my scholar friend not to heal the random goon. My friend used dissipation to put his pet away. We hadn't even finished with our pack when the dragoon died, forcing us to deal with the pack he pulled. Then, he proceeded to bitching at the healer for not healing him and to me for not taking aggro. I told him he pulled the pack on his own, so he would have to deal with it on his own.

He respawned on his own, and acted like a proper party member afterward. He didn't apologize, but there were no more incessant pulls on his part anymore. I told him if he wanted to act like a moron, my friends and I would let him die.