I was tanking ala Mhigo on PLD yesterday and the WHM kept on putting regen on me before each pull. I was too tired to say anything about so I just kept unticking Regen each time. But when we got to the apes after the first boss, I just had enough and kindly told her to please stop using regen on me before I pull. She proceeds to say "I'll heal how I want. It's fine." And thus she kept doing it. She didn't even bother to dps.