Ok, but then you have to ask yourself. How many players have done this? Probably at least half of the raiders in destiny. That would take an insane amount of time to go through the logs of all those fights. Also, with their game already getting bad reviews, do you really think they'll ban a large chunk of their player base? And, not to mention, the only people being banned would be those that actually quit the game, so even after banning a large part of the player base there will still be plenty of people not banned because they weren't the actual person to host/quit the game.

I never mentioned banning anyone, only that it is an exploit