A Healer's request to groups in dungeons:

[Maeka]

I'm sorry, mate, this a battle you will never win. Especially now when tanks sprinting off as soon as they're able is A Thing.

*shrugs*

Ain't hard to let a tank eat dirt in some of the more egregious examples, especially if they are also rude (more chance the DPS will side with the healer, if the tank is acting like a jerk).