I’m uncertain if deepfake porn should be banned; it’s already difficult to enforce copyright on the internet, because it’ll just get redistributed.
Similarly, it would be impossible to enforce restrictions on deepfake porn; because it can easily be redistributed.
Yes, but unless they consented specifically to having porn made from those images, that’s still highly problematic.
But only because that’s where technology is today. You need many images of the face at many angles, and it is only a face swap of real video that was captured.
Within 50 years it will be possible to create complete fakes from whole cloth. No images, no video as a source. Only a person’s imagination. At that point it is equivalent of cartoons.