“A reasonably good clone can be created with under a minute of audio and some are claiming that even a few seconds may be enough.” Mom wary about answering calls for fear voice will be cloned for future virtual kidnapping.
Basically impossible.
It’s against the ToS to use tools like teamviewer to run user support scams, for example, but people do it anyway. You can’t legislate against criminals, because if they’re already breaking the law, why would they care about another law?
The only way forward here is enforcement. There needs to be better coordination between governments to track down and prosecute those running the scams. There’s been a lot of pressure on India, for example, to clean up their act with their very lax cybercrime enforcement, but it’s very much an uphill battle.