OK, so you know how you can put books in frames and people can copy them? Well I thought that if you owned a book store and you wanted to advertise your books, then you wouldn't want the people copying your book and running without paying. So then I though, maybe you should be able to set how far a person can get away from the book frame, and if they pass that amount, the books clears. This way people can't steal books, they can only view them. I think it is a good idea (well yea, I came up with it ) but I want to know what you guys think.