I actually did this to a team one day last week. They could not see me at all, I could only hurt them with nades and nova bombs. It was supremacy. I was picking up all the crests right in front of them as they ran for them, you could see their confusion. I got a triple with a nova just walking around with the enemies. What happend was the game froze for a second where it looked like everyone was walking into walls, when it went back to normal it was like I was a ghost to the whole match. Let me say, I wasn't doing anything wrong I couldn't even go to orbit.