These types of restrictions are all over the place, and I'm not sure if they're good or bad. TVs and audio-listening-devices come built-in with dmca protection, meaning you can't watch pirated footage or listen to pirated music even though you own the device. Is that good? Is that bad?
That's bad, 100% bad. My TV does not need to be playing detective and monitoring every use of it. My car doesn't prevent me from exceeding the speed limit, not does it report me to authorities if I do.
I'm not aware of any such devices? I believe you have that backwards - many (most?) devices support HDCP, a form of DRM (and thus legally protected against reverse engineering by the DMCA). This is supposedly to prevent you from pirating (ie copying) otherwise legally purchased content.
In other words, the claimed motivation is to prevent you from running off a copy of whatever you happen to be streaming from Netflix. In reality though it doesn't seem to be very effective, leaving me wondering why so much time and effort is invested in it.