Did SONY really think they'd get away with this? They've just jumped the shark.
A developer noted some odd system behavior after playing a SONY CD on his computer. He made the connection after some serious detective work: Mark's Sysinternals Blog: Sony, Rootkits and Digital Rights Management Gone Too Far.
SONY had installed digital rights management software on his windows machine that profoundly altered many of the XP system internals. They may have broken a number of state, federal and EU laws. The software they installed cannot be removed.
I've written earlier about the perverse effects of digital rights management, but this seems as much a SONY problem as a DRM problem. SONY has shown they are a sinking and desperate company.
Update: Slashdot is all over this.