If the record industry didn't want an aftermarket that they couldn't profit from or limit, they would just have us buy songs by having the band call us on the phone and play the song once.

All this bollocks with filesharing and used CDs is the recording industry flailing like a dying fish because it can't adjust to the market. Hey, you want to sell you product on an easily reproducible digital format or on shiny discs that can be resold (hasn't this been happening since the dawn of recorded music?), then deal with it. Trying to fix things well after the fact is just going to make things worse. Innovate you jerks.