Let me update your scenario, instead of the innocent granny installing an iOS app the evil dude asks her to just give her the security code she just revived fro

Let me update your scenario, instead of the innocent granny installing an iOS app the evil dude asks her to just give her the security code she just revived from a bank, or she should open a link and login to her bank. I think you need a Big Brother for your granny, Apple needs to make Safari granny proof and whitelist websites and they should also force user to provide a national ID before calling to an iOS device, think of all the grannies. Imagine though an universe where Apple could hire some competent people that could create a genius popup that would explain granny that she should not enable that, and to enable that maybe she needs to use a code that is printed on the phone box.