It’s important to make it clear to Americans that this problem is mostly solved in other countries. It should be possible to end this tomorrow in the US.
Spam calls in the UK for example, are rare. All of the spam calls I get are from my US desk number.
That would seem to be least intrusive option.
Using the internet in the UK/EU is such a horrible experience, every cookie pop-up is a reminder how badly thought out these rules are.