Ah was thinking with the 360 in mind, my bad. Though pulling plug would be the same effect as dashboarding.
About the bad internet excuse. That's too bad. It just means they are not suited to host a game with a unreliable internet.
Stats and KD don't necessarily affect whether someone dashboards/pulls the plug. The problem lies with the fact that there is no punishment whatsoever for it. Punishment goes much further than just giving in, it's called growing a spine. Something game dev's seem to lacking nowadays.