It's not about what their ranking is or how it will drop their ranking. I don't really care for there rankings. The point is about discouraging people from quitting a game just because they are losing or if they just don't like the gametype. If you want to play the gametype you like, then play custom games with your friends. If you don't like losing, then you shouldn't play online with other people. Granted that if your wife is going into labor or your kid is outside fighting the neighborhood bully, that's a different story and I highly doubt that you'll be on Live again playing anytime soon in the next 15-30 mins. The idea is to make people think twice about quitting just because they don't like it or is losing. Sure, you can still just quit, but at least they'll have to sit out for the next 15-30 mins (and we all know we're all big Halo 2 game-aholics and how being banned for just those few minutes can be annoying to game-ahoics).