I have heard many rationals for illegally duplicating things and saying well I have a right to use this for "X" purpose. Your government dictates what is legal or illegal in laws set forth. Those aren't debatable unless you get them changed. Otherwise it's just a justification.
you missed something. the dmca does not exist to stop copying of works(despite rumors to the contrary). it merely states you cannot bypass the security(drm) of a file this applies to anything not just movies/music. even if you open your xbox to mod the heck out of it that is tehnically a violation of the dmca since you have to modify or replace the software component.
the actual copying of the movie is still covered under fair use laws. this is not illegal. the creation of an mp3 is not illegal. so the content makers want drm so the dmca will apply no other reason. and if we yell loud enough and vote with our wallets drm won't take hold and grow. i have the same negative feelings about hdcp in hddvd & bluray now you cannot back up a movie to your harddrive for a movie jukebox setup without cracking the disk.
i have set one up a movie/music jukebox myself myself. heck the media producers here even want mp3 players declared a pirate device. i don't make copies for distribution and i don't give copies to others. i am not a thief though our government is trying to make me one.