The implementation of region code silliness is enforced by only licensing CSS/DRM-relevant patents to hardware vendors that agree to restrict their customers in that way.
That's one of the reasons the industry insists on DRM technologies, even if broken, and tries to encumber them with as many patents as possible. It allows them to exercise control over the end-user experience.
That's one of the reasons the industry insists on DRM technologies, even if broken, and tries to encumber them with as many patents as possible. It allows them to exercise control over the end-user experience.