Even more extreme is a scheme called BD+ that deals with the problem of what to do when someone cracks the encryption scheme. The players can automatically download new crypto if the old one is broken. But there's an ominous feature buried in this so-called protection mechanism: If a particular brand of player is cryptographically "compromised," the studio can remotely disable all of the affected players. In other words, if some hacker halfway across the globe cracks Sony's software, Sony can shut down my DVD player across the Net.
http://www.businessweek.com/technology/content/may2006/tc20060526_680075.htm?campaign_id=rss_tech