Yup. if everyone he plays is miserable, because of one guy, and nobody speaks up, that's just geek social fallacies bringing everyone down. It IS ok to exclude people if they're being jerks, and having the confrontation won't be fun, but in the long run, it'll work better for everyone.
But conversely, havign played against similar people myself, they put a lot of effort into pushing the limit JUST right so that no individual opponent gets pissed off enough to dob them in. There are a couple of people I know of on the UK tournament circuit who are a bit notorious for it. in the particular case I'm thinking of, very slow play, whilst running an alpha strike list, to the point where in one match I was probably two rounds from winning and about 4 or 5 rounds behind everyone else, at time.
And no, I'm not naming names on an open forum thread, but I do know next time I face one of them, if the game goes the way it has previously, I'll be heading over to a judge after the game to let them know.
Edited by thespaceinvader