Passive agressive topic with more than 10 "back at you" answers sounds more like a rant than an honest question but oh well...

You MT. They take aggro and don't toggle.

You don't mind ? Toggle off and let them have it.
Pisses you of ? I don't see why, unless you care about MTing (and I can't think of why unless you're actually part of the crowd you vilify...)

If that happens in a content where fighting for aggro will kill a party, it's called Extremes and Savages and require a strategy, so it shouldn't happen because people in there react quickly to "dude. stance." comments.

In other content where it could happen, aggro contest have no consequences whatsoever so we healers and DPS don't really care about this situation. Positionnals ? like I give a f in an alliance raid...