I've definitely wanted to boot myself from groups, but never been booted, nor have I booted anyone else. Our server has a board where we keep a POMS list of the biggest scammers, retards, screw-ups, trainers, KS'ers, etc. (the Piece of Monkey Sh . . er, poop list). That a good way to filter em out. It's on our server flameboard, so there are some (a few) entertaining threads, and most of the folks have gone there to read up on it for sheer amusement value. Normally the real retards start finding themselves unable to get guilds or groups, and eventually transfer or quit or restart and not be such an asshat.
My personal pet peeve is when I get an invite for a DoN and they are either anon/role, or have the 1 level 70 person doing all the recruiting. I don't like to group with a bunch of 65s or 66s, because I tank the whole time, or it takes forever to finish. I was kinda steamed when one group of lowbies were looking for another person and I told them I had a very well geared 70 ranger friend lfg, but they decided that a 63 warrior alt of a friend was a better choice (the friend didn't want to play their 70 druid, apparently). I almost dropped at that point.
My other pet peeve is premature evacuation! Darn newbie evac classes!
I usually do a guild group exp session once or twice a week and rack up 10+ AAs each trip, but I also group with newbies some too. I don't want to get too elitist, plus it keeps our guild in the mind of newer folks when it comes time to recruit again.

Always be nice, make a good impression, and help those that need it. Makes the game that much more friendly, and helps you out in the long run. People remember good players and guilds. That kind of PR is worth gold! (maybe pp!)
Chutoi