Pirates and theives could care less about DRM, theyll crack it in a few weeks the people who should be bothered are honest content owners being treated liek pirates and theives. When you start to tell me what systems I can play my legally owned content thats a problem!
If the contract that you agreed to when you purchased you content expressly states that the content may only be played on a particular system, then that is their right, as the content producer, to do so. Your right is to not purchase the content if you feel you cannot live with the terms of the contract.