The problem is that most of those protected disks also don't play (or don't play correctly) on a regular audio-cd player!
I can't actually tell you what goes through you head If you've bought a CD only to find out you can't play it, but it goes something like this : huh? Damn! [censored]! G*dda@#|!!^ !!!! Bastards!!! (or something to that effect! )