The problem is that the son and parents are not talking at all now because of the situation. So the parents don't know if the son has replaced the passport yet or if he knows that he doesn't have his passport.
We're spying on him via facebook, and I guess the guys set up a website for the trip. I'm going to post the website here as soon as I find out what it is. So far the trip is still on for next week. Thanks for all the posts amd pm's. I'll keep you updated. I think there's a lesson here for parents- never forbid anything. It makes kids want to do it even more.