I'm looking forward to the first famous court defense against audio or video evidence where the defendant simply says "Nope, not me." "It's fake." "It's a total fabrication!" You're going to need forensics experts specifically trained in figuring this out. Probably even using AI itself to determine if something was AI-generated.

The real danger in this stuff is not how it would be abused in a court of law, but in the court of public opinion. A lie can travel halfway around the world while the truth is still putting on its shoes.