You may find this interesting.
http://it.slashdot.org/it/05/11/11/1...58&tid=233
Sony installs a rootkit on your PC to hide the files, and now hackers and spammers are using the rootkit sony installs to hide their files from you. As a result Sony has now apparently decided to stop bundling the software with the CD's, but the cat is already out of the bag.