It's even dumber of course, because many people, when faced with the issue that they can no longer get a DRM free copy of something they bought, have a perfectly reasonable alternative that is free and provides DRM free copies of nearly anything. I guess it must be really important to stomp out the casual copying, but I find it hard to believe that people who are just casually copying would bother to do what was necessary already. Seems to me like this is probably something that mostly power users would've done.