Facebook should not be monetizing users' two-factor authentication (2FA) phone numbers. The practice will discourage some users from enabling 2FA, a net loss for security that makes it easier for criminals and spies to breach user accounts.

The gargantuan Facebook monster is determined to gobble up every little bit of data about you, including what phone number you register for 2FA — then using that phone number to manipulate you with targeted advertising, according to reporting by Kashmir Hill yesterday at Gizmodo.

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