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Reminds me of the time a CEO of a UK based chain-store wanted a webcam on his desk, but at the same time the webcam wouldn't be able to allow the person on the other end to read any documents the CEO might have within view of the webcam. "If I hold up a sensitive document in front of the webcam during a conference, I don't want him to be able to read it". It was a real head-banging moment, he genuinely thought that there was a technical way to stop the camera from focusing on anything other than his face. This was in 2001.