There is no need for any fo this, really, everybody know that there is a difference between trying to be helpful and trying to be obnoxious. I don't mind a DPS who pulls something I forgot or I did not know because I am new to the dungeon, I am grateful for it in fact, because the way I see it, they are trying to be helpful. That DPS however who is always trying really really hard (you can see how hard they try) and doing everything they can to outrun you and pull ahead of you depite the fact that you are sprinting and running as much as you can is just trying to be obnoxious: that guy is not helping, he is in fact slowing us down because he is messing up my timmings to pull and hit everything and forcing me to be constantly adjusting. I have found more than a handful of this kind and while I don't care because I have no problem adjusting and going slower if you force me to with your "hasty" ways, I can see how it can be annoying for other tanks.

You pull you tank is petty, yes, I agree. Don't be as petty yourself and let the tank do his thing, or at least try to be helpful if they are not as fast as you would like so they can improve on that regard. Being blatantly obnoxious is not helpful for anybody.