My favorite is when ragequitters try to rationalize their behavior. What amuses me is that for most games the online play barely resembles the offline actually competitive/professional play. So to me that makes the people who take the online play as seriously as most ragers do seem even more pathetic (i.e. "Must...preserve...win/loss record"). I play a lot of fighting games and when I see someone with a ridiculous record I assume it's too good to be true and I'm usually right. About the only time I would accept mid-game quitting for non-emergency reasons would be in games like the aforementioned L4D2 where it's entirely possible for one player to completely sabotage a teams ability to win either through being an idiot or due to being a malicious douchebag.