It's not even really about stopping your friend, although I'm sure they'd like to do that too. They want to prevent there from being a zero effort "download but

It's not even really about stopping your friend, although I'm sure they'd like to do that too. They want to prevent there from being a zero effort "download button". That's the only advantage of DRM (same with DVD/digital delivery). Even the act of having to insert a DVD, or hit play and manually record is enough to stop people. If they went entirely DRMless, you'd just be able to copy the content to a thumb drive, and share with friends. Instead, you have to mess around with other software (or in your friends case hardware), that does sometimes "breaks", or is otherwise inconvenient. It's the same as DRMless games; people absolutely go crazy making copies (even back in floppy disk days). As much as the pirate community likes to pretend they're in it for moral reasons, some of the DRMless games by smaller developers became the most pirated games out there. It is a very minor deterrent, for people that are too lazy. That's one area where streaming has prevailed over pirating. People can be extremely lazy, and having a convient streaming platform with decent content, is enough for some people not to bother.