This is only tangentially related to where this thread is going, but in Terminal A at the San Jose Airport, they security folks made a short video that you watch while waiting in the security screening line. It tells you about all the things that you can't bring on the plane, that you need to have your laptop computer out separately, and that it might help to remove your shoes for screening.
But the best part of the video is that they tell you to remove metal objects that you are wearing before going through the metal detector. To illustrate, they have a totally normal looking California guy wearing the BIGGEST cowboy belt buckle I've ever seen. I mean, this thing is the size of a license plate.
I went through a period where it seemed I was picking up and dropping off people at the airport quite frequently. I brought my 5-year old son along once and showed him the video which got him laughing as did the people near us in line.