However, IIRC they added or strengthened this warning after the initial controversy.
I would argue this is bad UX because it forces the user to all at once make such a big nebulous decision about what their friends are comfortable with.
It's like 20-page T&Cs, only worse. We all know that approximately nobody actually reads the T&Cs. But we can be damn sure that absolutely nobody will actually go and ask all their device contacts whether they're happy to have their details uploaded to Facebook.
This is my basic problem with Facebook's whole MO: it tries to solve the one problem no single data mining company can ever solve -- having enough resources to spy effectively on everyone -- by recruiting people's own friends to do much of the spying for it. There is something fundamentally shady about that, if you believe privacy and control of sensitive personal data have any value.
Like mentioned before, I'd be surprised that just because I accepted the T&Cs in app that this would be permissible under EU laws if the other party hadn't consented to FB retaining their number.
They should have asked, but whatever. Are you shocked? Iirc I synced my Address Book to Facebook anyhow.
My Address Book is on Apple's server, my TimeMachine drive, Google's servers, apparently Facebook, and any number of other online services. I don't really care. I'd much rather have the data backed up than risk losing it. And having it on Facebook has obvious utility.
Nevertheless i never explicitly opted into this which is bad.
I don't know what else someone could think "Contact Sync" does. But yes, if they ever turned that on automatically, for shame. I don't see any evidence that they did.
I actually like this a lot. If they then shared those phone numbers publicly I would complain...but why would I not want to sync my phonebook to Facebook (anymore than I'd not want to sync my phonebook to Google, which I certainly do as well?)
As it turns out, these contacts were all from my dad. I used his blackberry once last year to check my Facebook and I guess it loaded his contacts into my Facebook account. I don't remember authorizing it to do that (though it was likely in something I just clicked through). Still, this seems like an easy way to steal contact lists from people - "oh hey, can I check my Facebook real quick?"
Like I said, this was a year ago, so I'm sure things have changed (another commenter mentions "a hubbub about this a while ago"), but neither I nor my dad realized what had happened until now (he still doesn't know, I suspect).
This sort of thing is what keeps people from doing anything substantial on facebook. Can you imagine "Facebook Docs", FMail, or anything of the sort? No. Because facebook would make it all public without telling anyone.
I really believe that in the very long run, this culture of invasion will limit facebook's potential.
I'm sure this was in the TOS somewhere, but really? It's just disrespectful.
Your friends entered their phone numbers. They are your friends. You can see those phone numbers if they choose to allow you to do so. You also (possibly) chose to import your address book of your friends and Facebook is showing them to you. The numbers are not public and everyone involved explicitly agreed to share the information. What part of that do you object to?
That said, my opinion on facebook's attitude towards me and my privacy is unchanged. It's easy to get jumpy when a company disregards your privacy at every turn. Had this been on google (for example), I'm pretty sure I would not have jumped so quickly to what was probably an incorrect conclusion. But it was fb, who has repeatedly disregarded my wishes and abused my trust to the point where I literally treat everything I put on it as public.
 I'm involved with https://www.socialfortress.com
FB continues to lead the way when it comes to "it's in our TOS but don't go reading it because it won't match our marketing copy"
At no point was it mentioned that they would be helping themselves to the rest of my contacts, to whom I have no connection to on Facebook.
Pissed off doesn't even begin to cover it.
However, this is kind of irrelevant because 99% of users are not going to read this kind of a warning no matter WHAT it says and are just going to click through. They want their Facebook photos on their phone contacts dammit!
What I don't understand here is why everyone is so concerned at all about this. If you have an Android phone, Google has your phone book. If you have an iPhone, Apple does. If you back-up your computer to the cloud, they have it too. As long as none of them share it publicly, why do you care?
If Facebook was sharing your private phone numbers to the world or exposing who you had in your phonebook to people, I'd understand the outrage. But all they did was backup and sync your contacts which seems to me to be a service, not an offense.
As for suggesting a name, isn't that just automating the tedious tagging work you do on Facebook? I really don't see what the privacy worry is there. They have the capability to do face detection whether they use it or not, and this seems like a really valid use for it.
The Barnum quotation comes to mind.
It seems like that page only lists the numbers from people who willingly shared their number if you canceled out of the import feature after installing the facebook app on your phone.
Edit: Found it in Friends -> some arrow button on the top-right -> Sync contacts -> Enable. So you can go there if you want to enable/disable the feature.
When I installed the app, Facebook didn't even ask me if I wanted to enable it. I actually manually typed all of my contacts instead. I wish I knew about it before :(
My phone number is the only public piece of information I have on Facebook. That's only because it's a Google voice number which is the best thing since sliced bread.
I believe the syncing option is off by default
If you wanted to make some point by posting this link you should have written your thoughts down somewhere and linked to that instead.
"Facebook Phonebook displays contacts you have imported from your phone, as well as your Facebook friends.
If you would like to remove your mobile contacts from Facebook, you need to disable the feature on your mobile phone and visit this page."