I sympathize with your goals of raising awareness, but I think it is in general a bad idea to teach security measures which are only for show. If education is your goal, don't you risk teaching people the wrong threat model?
It's not. I do the same thing. And it works better then I expected. People do this in my office too now and thy come back with questions regarding security that go further then this. This happens also because they are being asked why they do this. It makes them think. They ask themselves why they put tape on their cam but "hide" their crappy passwords under the keyboard and so on.
