Facebook to exclude phone numbers from reverse lookup – for users of two-factor authentication, anyway
Facebook’s SMS-based login security was a Catch-22. You had to give Facebook your phone number to improve security. But that exposed your phone number to the vagaries of the Facebook search system.
That’s now changed, but apparently only temporarily, while Facebook decides what happens next.
Story added 16. October 2012, content source with full text you can find at link above.