If millions of people start getting fake kidnapping calls every day, then I'm sure we will stop falling for it quite soon. There's a limit to how many days in a row you will keep sending money to every random AI-empowered guy calling to convince you he has taken your daughter, only for her to return home from school like normal just a few minutes later.

I don't think it will be long before video and audio is no more convincing than text is now. We will stop falling for the AI scams, just like we (most of us) stopped falling for the Nigerian princes, scam ads/virus popups on the web, and those fake emails from family members claiming they need us to wire money so they can pay for a flight home or whatever. Basically, my thesis is that people will start to get wise to any scam that is sufficiently common and harmful.

Real kidnappers might have to learn to work to convince the families that the kidnapping is real and not just another scam.