This is a great game. The only annoying part for me, and those I've played against, is matches against people who quit mid game. VERY annoying.
How about a rating system, like EBay uses on sellers. You could show the rating when you are matched up against someone, and decline games with quitters, or abusive players (not many, but there are a few)
Alternately, if I had the ability to have my own blacklist, or unfriends!, so that anyone I put on this list does not get matched up against me (cos I forget the names of some of the duds!!)