I dont think this is a viable option for music cd's because it takes away our right to have multiple copies of the music that we buy. In fact there was recently a class action law suit brought on agains american record giants for just this reason.

The five major record companies have been hit with a class-action lawsuit charging that new CDs designed to thwart Napster-style piracy are defective and should either be barred from sale or carry warning labels.
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