I don't even have the game yet (I want one ) but my opinion:
I heard there's a ranking system. That means maybe people d/c on purpose, just so they wouldn't go down in ranking - easy 1st place. 500 wins, 0 losses O_o (example).
(I must not lose! *thinks- hehehe, it's so easy*.)
Of course, what ticks me off is that people get d/c'ed and the person who won gets pissed. Then the person who wins, loses and then d/c's.