Its terrible and bad idea. I'm 33 yr old and i have like 90 accounts in different place with my mobile number, everyone care abt my security bla bla bla and its all is no sense at all. Its like identification number in any country, dont give it anywhere etc. But everyone got it anyway.
Dont complocate life of people in name of security.
I want just play damn game and chill.
I'm negative to propose