In a blog post at http://www.sysinternals.com/blog/2005/10/sony-rootkits-and-digital-rights.html Mark Russinovich reveals that a CD he bought from Sony installed a rootkit as part of its DRM (Digital Rights Management) software. I don't oppose the right of Sony or anyone else to protect their software/music/intellectual property but when they resort to installing rootkits that could be used to hide other malware then they have gone too far. I haven't purchased a copy protected CD and after the problems that some Mac users had years ago where they couldn't eject the copy protected CDs I was a little skeptcal of their value. Now I am really beginning to wonder if the marketplace shouldn't speak up loud and clear that this is totally unacceptable behavior.