Convincing enough deep fake + the 24/7 news industry + Twitter rage machine combined will at some point overreact way too fast and too hard and someone will get actually hurt, maybe even killed.
Actors have had clauses for not using their likeness for a long time now, if their face is 3D scanned, the use cases are carefully limited. They can't just put Brad Pitt in a random commercial even though they have the scans of his face and body and can find a voice actor.