As much as I hate the idea, I'm convinced it would be a godsent for 99% of the population.
Just imagine when you buy your SIM card the phone shop asks you: Do you want to limit incoming calls to people who you either called before or who have ever had a permanent residence in your country? 99% of spam and scam calls blocked, just like that.
And just imagine how hilarious it would be if all those Nigerian prince emails had a note that says "actually, the sender of this email has never been to Nigeria"
Just imagine when you buy your SIM card the phone shop asks you: Do you want to limit incoming calls to people who you either called before or who have ever had a permanent residence in your country? 99% of spam and scam calls blocked, just like that.
And just imagine how hilarious it would be if all those Nigerian prince emails had a note that says "actually, the sender of this email has never been to Nigeria"