Or what if you have 5 friends online at once, including yourself? 3 team up, and the others get screwed. Or 4.., or any other number that is not 3 or 6 :). Optional matchmaking could also help in the instance when you just want to "fill out" your fire team. This needs to be addressed, especially with more and more content coming this way, its just locking more players out of parts of the game. Sigh