In Ukraine, to fight with fake accounts, government designed BankID[1][2] system, based on experience of few other countries, such as Canada. In this system, user authenticity is confirmed by a bank. It would be nice to integrate BankID with FB/YT/etc., then display country of the bank.

[1]: https://bankid.org.ua/

[2]: https://docs.google.com/document/d/1rjRu1zCS2OmuXlUYDii_0AsG...