Yesterday, on KA ground elite, we had one guy that in the beginning of the mission just stand there, not moving while we cleared all borg before the nodes room.
Then, when we start the cleaning he goes to the room and begins to drop shields at random. We asked him to stop but hi didn't. Finally, one of us just beams out and as soon as he realized the team was down to 4 he beams out too. Reduced to only 3, we decided we would finish the mission and not loose our time.
We lost the bonus, but manage to finish the mission and got our rewards. Actually it was easier with 3 taking it seriously than with 5.