Hey dumbo. Yes, they are.
Please explain how, if Facebook isn't sharing telephone numbers, why my telephone number (which was previously explicitly made private) is now in the contacts list of numerous people on Facebook. And given the fact that the telephone numbers of people I don't know are in my contacts list, I think it's fair to assume that my own telephone number has shown up in the contact lists of people I don't know.
I now have the telephone numbers of several passing acquaintances, who may or may not have wanted me to have that information. The telephone numbers of people I know and who have avoided joining Facebook due to security breaches like this have been stolen from my phone and are now on Facebook.
I pointedly use the word 'stolen' because I explicitly refused Facebook permission to sync my phone contacts, and they did it anyway. I double-checked the settings on my Facebook app and confirmed that this setting is still in place.
Almost everyone seems to be missing the reason why this incident is and should be so contentious. As far as I'm concerned, the issue isn't really about whether or not our phone numbers have been made available to others. I could frankly care less about my number being made public. The point is that Facebook has taken information from people's phones which, in at least some cases, they were explicitly refused access to. This isn't the first time they've shown themselves to have little regard for others' right to privacy.
However, even if you accept that Facebook's intentions are completely benign, the breaches in their security combined with their database of user information (which could contain anything at all they've managed to snag from us) should give everyone pause. Identity theft is a thing that still happens, and Facebook taking control of personal information away from its users (and even people who've never used Facebook in their lives) increases the chance of it happening. It's unconscionable, as far as I'm concerned.