An anonymous reader writes: We all know that making copyrighted material available for download is illegal in most countries. But suppose I wrote an application that would make it possible for me (and others) to *lend* (legally acquired) media files to other people. Every file would only be usable by one person at a time (including the original owner), making the whole thing effectively equivalent to handing over the physical media. Do you think that would still be illegal, and if so, why?