Does not sound reasonable. He is a police officer giving a seminar on safety, I?m guessing he either doesn?t know enough about IT or thinks it can?t do no harm, or just simply using scare tactics. BUT you should ask at computer forums, and add that story.
Even if it recorded, where would that data be? Video cam on all the time, should consume loads of data. Where is it stored? Hardware doesn?t work like that, it works along with software telling it do a specific thing. Is the software on? There should also be a light turned on, some green light or something signalling that it's turned on. And with you in front of it I bet it is turned on
And I also worry about it, but it's just regular fear. I worry this would happen to me:
http://www.youtube.com/watch?v=daP9UatPjbc