It happens at "adult" jobs too. I found a number of webcams in the organization with no password. I flipped the image on one, and sent an email to IT saying, "Hey something's wrong with the web cam - it's upside down. Oh and probably you should put a password on it ;)"

It didn't go over so well. It embarrassed them and lead to some major reprimands for me, almost to the point of losing my job for unauthorized access to systems.