I gave up on facebook (but I wasn't trying that hard) but it seemed to be using the extortion practices a lot of services use now. At first it appears to let you create an account but upon logging in for the first time it demands a phone number for 'verification'. Microsoft was even worse when they migrated my mojang account, it let me use it for a little while before demanding the number.

Back when I had a facebook account I recall it suddenly up and demanding I scan my drivers license one day or I couldn't log in again...on the same and only machine I actually had used facebook on.