[paranoidrobot]

Using actors in news stories is pretty standard when the interviewee does not want to appear on camera, or use their own voice.

There's a long history of this kind of masking:

- Backlighting, with the face in deep shadow. Possibly with the original interviewee or an actor.

- Voice-Masking with some kind of voice-changer

- Using a voice-actor to say the words.

I would see this as the next evolution of this process.

So long as The actor being portrayed has given their consent to do this (they were hired for this specific job), and the facial expressions/behaviors are genuinely recreated I don't see any ethical or moral issues.