You know, people turn off their modems when they know are going to lose. I think shouldn't be difficult adding a system to detect which side produced the fall and penalize them as a lose.
Yeah, a couple of "innocents" would lose some points but hundred of loser cheaters would either stop doing cheats or leave the game.
They are the reason I don't play on ranked mode, I'm not going to fight and win 30 battles for only get 2 valid wins because the other 28 guys disconnected.