Sony Music wants to control what you do with CDs you purchased legally:
According to reports, Sony has been stealthily installing hidden software on PCs, when people try to play Sony BMG music albums on their computers.
This software installs automatically, when users insert music CDs with XCP digital rights management technology in their computers. The software is geared towards limiting the number of copies that users can make from CDs, plus restricting ripping of the disk.
Software developer, Mark Russinovich, discovered that Sony had secretly installed a rootkit on his system. He traced the software back to Sony and the XCP technology, from First 4 Internet, an English software developer.
Sony’s perogative, I suppose. But I can choose not to buy their music.