The players(collectively) have an enrage timer.

[Souljacker]

Player Enrage would be for those that go "If we don't clear this in two attempts, I'm quitting". Sadly, unlike boss fights, Player Enrage fluctuates, typically between 5-30 minutes.

This is where I thought he was going with it. Even the groups that tell you to check your BS at the door invariably has that one guy who just can't take more than a couple wipes before hitting enrage.