Yeah you'll always get a douche who won't get out. I think a couple of those guys are "Dad_E_RaZz" who likes to be a douche troll and not get out, then come cry on here.. I think it's common courtesy to get out and let someones gunner hop in. 95% they get out for me, 5% they don't so we ask them for a min to get out and if they continue to be an ass, we just drive off with them.. Sad part is, once tank gets hit, they jump out and run away.. When someone asks me to get out for their buddy, I do, its no biggy.. Game is way better with mics.. Sucks to fly chopper with no mics.
At the end of the day, don't be that guy, just have fun with your friends and be respectful to other players.