People who ignore their threat guage

[Lunaxia]

snip

I was talking about trash mobs where it's very obvious who is attacking what, but one of the DPS still fixates on an entirely different target several feet away.

Whether it makes me a "crappy" tank or not, I'm not going out of my way to rescue them when they're not even bothering to do their job right. The Hall of the Novice even teaches about this now.