Oh, no doubt.
Multicam becomes disconcertingly effective at certain times of the year around here.
Here's a picture of my buddy the last time we went out. During one of the last games we played a big "assassinate the downed pilot" game and he was the pilot. My team couldn't respawn, his could, but if we took out the pilot before he reached the extraction point we won. Therefore we had to pick our fights. At one point I came around a corner and saw some of his defenders who were standing all around him. But I did not see him.
After shooting one I made a conscious decision to disengage, since I was convinced my target was elsewhere.