That was fun, beat the whole campaign on Hard yesterday with my brother and various pick-ups.
It was hilarious. On the freight elevator level, this noob sets up a turret right in front of the button to set the lift moving. My brother the tech can't get it to go, so he picks up the turret so that he can hit the button. This noob then proceeds to FF him, me, and the other guy (who leaves).
We try to kick him, but can't get the final vote because the new fourth player doesn't know what's going on. My bro and the noob exchange words, but he won't leave, so I say, "Whatever, just don't kill us this time," and I start the mission. Guess what happens?
Right away, he kills me and my brother, the fourth guy whacks him, but is now alone at the beginning of a mission on hard. He doesn't last long, but fortunately the noob leaves.