I've been chasing down several accounts of government agencies, companies, educational institutions and others banning the use of Sony CDs on their PCs, due to the security risks of having Sony's rootkit DRM infecting their PCs. One government ministry, Alberta Agriculture, has banned the use of music CDs altogether, since Sony is hardly the only music company crippling its CDs with sneaky, malicious software.
Way to go Sony. This is the way to fight against piracy. Produce so bad quality discs that employers will stop their use at workplaces.