@Talia...Sorry to hear about your experience with that d-bag tank. But I still think he represents the exception more than the rule.

To paraphrase another poster: A-holes are going to find ways to be a-holes. Does the addon in question give the a-holes another tool? Sure. Just like gearscore and recount were weapons in the a-hole arsenal. But in responsible hands, those tools can be used to help our fellow players, and ourselves, have a more enjoyable experience.

I'm especially surprised that it was the tank that had the attitude. Most tank, at least the good ones, take great pride in their ability to have a successful run with any group. They pride themselves on being the teachers and caretakers of the group, to a certain extent. I play a rogue and am not ashamed to vanish and hide while my party dies if things are going badly. Sure, I'll hang on as long as I can, and Evasion tank if there is a chance to get the boss down in the next few seconds to avoid a wipe, but I don't see the sense in upping my repair bill when vanish is within such easy reach. It's one of the reasons I'd make such a lousy tank. I don't have the caretaker mentality, as all good tank must.

I would chalk your experience up to a bad tank being bad, and an a-hole being an a-hole. Not much you can do about it. :)