it's only going to work on copies of releases that are registered to specific individuals or organizations, right? so while it might slow the initial upload of a new release to the Internet, it's not going to mean much once the movie goes to dvd. in addition, how long before someone figures out how to strip the FirstSource encryption? as we all know, in the arms race of DRM, for every measure, there's usually a countermeasure - and there's folks out there who live for this kind of challenge