Thought about that, Richard. Not sure it would help, though. Keeping him focused on what he needs to do is the real problem. It's a struggle for me(us) daily. I absolutely refuse to use his ADD/ADHD/Asbergers,etc as an excuse.
My Dad used to stand at the bottom of the stairs and holler our names. You didn't WANT him to have to come upstairs and get you. We weren't sure what would happen but we figured it wouldn't be a good thing.