I did group with the guy, as I gave him the benefit of the doubt (which is how I found out he had a very poor build and playstyle), but he got kicked after we did 2 vale quests, as he died several times within the first and twice within the second, mostly due to his going off on his own and not knowing how to take care of himself. Sometimes you just have to let them go and hope they learn something elsewhere.
I also can't stand that last line. I can take care of myself perfectly fine without a group of TR's. Is it bad to want to group with competent people that somebody doesn't have to hold their hand through quests? Somebody that's not an automatic 10% penalty? I also don't mind carrying others through quests so long as they learn something in the process.