I keep my digital camera handy during class in order to catch the ocassional sleeper. There were three, but the rightmost one woke up as I lifted the camera. As his face was clearly visible and recognizable, I cut him out of the photo. I try not to post identifiable faces.
Sleep in class, get posted on the net!
Last semester, I caught two students sleeping, one of them twice. Their photos are here, here and here.