[jmopp]

On the one hand, I agree with you. On the other hand, the false positives (and the fallout from it) might outweigh the negatives: imagine a volunteer doctor who disappears in West Africa due to being kidnapped/robbed etc and someone local tries to contact the family back home, but all the messages end up getting blocked.

[orthoxerox]

Something simple like a face match or even an email unlock if you connect to the account from an unusual location should work. A lot of websites do that already. So a volunteer doctor from the US opens their phone in Lagos, gets challenged, answers, Meta now knows that Nigerian IPs or whatever VPN they use are fine.

[dclowd9901]

This seems like such a contrived example.

By all accounts the Dr would probably be in better shape if the kidnappers weren’t able to contact their family.

[jmopp]

It's not the kidnappers trying to contact the family in this case. It's the clinic administrator who doesn't know why their doctor hasn't shown up for a week