Exactly. This won't stop any determined bad actor, if anything, it's just going to boost their credibility when they inevitably come up with a bypass that allow

Exactly. This won't stop any determined bad actor, if anything, it's just going to boost their credibility when they inevitably come up with a bypass that allows them to sign any piece of media as "authentic" (in a few days or weeks after a device implementing such a scheme is released). What then? 99.9% of honest actors are paying with their privacy[1] and usability again, while remaining 0.1% of dishonest actors are using a bypass - which sounds a lot like piracy and various DRM schemes. We've been here before, and it never works. [1] While this might not be an immediate goal, I think it's pretty obvious any such scheme would eventually be corrupted to encode a traceable device ID into every photo and video taken with the device - to protect the children and stop CSAM, of course!