Another interesting article from Jeremy Allison (he had written earlier about the document lockup with MS Office 2007)
" ... Sure, there's gobs and gobs of extra software in the process which is usually run at the consumer end of the deal, trying to obfuscate and hide the fact that the consumer possesses all the information needed to decrypt the file they've just been given. They have to have been given this, else they can't listen to the song or watch the movie. Claiming that this process can ever be made secure from the people you've just given all this information to is like believing you can create a secure bank vault by drawing chalk lines on the pavement, piling the money inside and asking customers to "respect these boundaries". The media industries are trying to sell what they consider to be valuable data without any means of prohibiting access to it. This is not a business model that is ever going to work."
http://news.zdnet.com/2100-9588_22-6189011.html?tag=nl.e550