There is NO WAY I'd EVER give facebook or any other random internet service any real identification (that includes phone number).
Forcing someone to provide real identification for a service that didn't require it to sign up in the first place is just ludicrous.
For all intents and purposes my email is the sole identification available for a service like facebook. Further, a passport picture isn't worth squat because there is nothing linking my email to it anyway (and a passport picture can easily be forged or copied).
