Why any CoD title has never removed the Join Session option? Think about it, it locks in 6 people per team and dish out some sort of punishment to players who back out mid-game or dashboard. Similar to Halo you wouldn't be able to invite a friend while you're searching for games and they couldn't join your session. It would almost eliminate boosting and gives kids a reason to actually finish the game. How many times have you played a team and 4 of the 6 players back out and its now 6v2. It's annoying. It would also make it possible for playlists like Doubles and Team Snipers since there would be no worry of boosting. Just my thoughts but maybe someone has some ideas or reasons as to why this hasn't already been implemented.