Or you have 1 player on your team (the commander) who might be somewhat new to the game or just a bit off their game. I've been able to get to cvs that have level 3 MGs scattered around their base. Especially with BE comm you need it covered from all angles and with new players they don't usually notice turrets dieing in their base when a lot of other stuff is going on. Ninja vs Comm is a pretty much 1v1 minigame that can end the game for everyone. Not fun.
