You are correct. But it's not about stopping scammers, it's about making their lives as difficult as possible. The problem is, as seen with Facebook [1], even that was not enough to stop "self-xss" exploits.
The actual way to stop the scammers would be to sanction their host countries into oblivion: India, Philippines and Myanmar are big in targetting English speaking countries, and Turkey when it comes to German speaking countries. Scammer Payback alone has made so many complaints with very little follow up from local authorities, partially due to open corruption. Either these countries clean up their act or they get dropped from SS7 (phone) and the Internet. But I see no way of this ever happening.
The actual way to stop the scammers would be to sanction their host countries into oblivion: India, Philippines and Myanmar are big in targetting English speaking countries, and Turkey when it comes to German speaking countries. Scammer Payback alone has made so many complaints with very little follow up from local authorities, partially due to open corruption. Either these countries clean up their act or they get dropped from SS7 (phone) and the Internet. But I see no way of this ever happening.
[1] https://stackoverflow.com/questions/21692646/how-does-facebo...