Mark Zuckerberg tapes over his webcam
theguardian.com
theguardian.com
I cover my camera because almost all business conference software in 2016 turn the camera on by default. BlueJeans, GotoMeeting, etc. Sometimes I am just attending a meeting as a listening participant or talking with a client who honestly only dialed into the meeting. At any rate, I'm not very interested in showing my face by DEFAULT.
I would suspect that may be the case for Mark as well. TheGuardian's piece is a great fluff article (my opinion only) but I have to wonder if Occam's Razor applies here. He too may not want his face transmitted to a meeting by default?