Honestly I love tanking, and the fact that anyone could say we aren't in the "team" mentality is obliviously self-righteous.
That aside, I make a point to blow through fps as fast I can based on the skill level/etc of the group, and STILL dps will sometimes start pulling mobs after running ahead, but I just can't fight the nature of the tank role when I play, it's my job to get aggro off everyone even if they were being an idiot. I don't want to cut of my nose to spite my face.
I do however almost always point out that it's annoying me or that it's just bad form to be pulling as dps, in regular fps(tac fps are fair game, and frankly I dont even like running them with tanks in the party)
...sadly most of the time they can't understand what was wrong with running ahead and using Overload to knock one trash pack into another before I'm even in the room.
EDIT: On a funnier note, about repair costs, I ran an fps once where we died a few times due to stupid things, so I made some off-hand comment about how much it was gonna cost, and one of the guys in the party takes it personally for some reason and begins to insist that repair costs never go over 3k no matter what.