If you make it expensive enough to extract, and tie the private key to a real identity, then you can make it hard to abuse on scale. Here I mean that at point

If you make it expensive enough to extract, and tie the private key to a real identity, then you can make it hard to abuse on scale. Here I mean that at point of sale you register yourself as owner for the camera. And you make extracting a key cost about a million. Then bulk forgeries won't happen.