When I'm tanking and someone decides to pull a group I specifically did not pull, I let them learn from their mistake and let them die or at least sweat before picking up the enemies. I don't care if you're "go go go", tanks set the pace. If you want to do big pulls, you tank. And it just seems really rude and irresponsible for some random DPS to run ahead, pull 3+ enemies, then run back to me like a child running back to their mom because they just swatted a hornet's nest. You pull, you tank. Full stop.