Re: Well we'd need a more refined bill of rights
The choice you have is whether to buy or not buy the movie legally. It's not as if these things are essential for your survival.
Of course if they started DRMing food/essentials you might have a leg to stand on. But as it stands they are only DRMing luxuries. And while they're only DRMing luxuries you have the option of not having said luxury.
Additionally I'm pretty sure that you could approach a studio and ask them for a DRM free copy of the film that you want. Though you can expect to be laughed at if you're not rich enough or from the right industry. But if you're rich enough I'm sure they'd sell you one for a few hundred thousand pounds.