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People allowing the app to access their contacts presumably. Contacts can contain email addresses as well as phone numbers.

>>wackro+(OP)
I'm pretty sure FB accessed the contact lists of some of my friends. I've never installed the app or otherwise interacted with FB.

I also know that one of my so-called "friends" posted a group picture with me in it, and labeled the people in the picture. At one point I did a search to see what information was out there about myself, and that picture popped up associated with my name.

I guess that I'm just another casualty of the information age, in spite of my best efforts.

>>wackro+(OP)
They do the same in WhatsApp, the app collects your personal data through your aquintances, and they hold your social graph even if you're not a WhatsApp user.

>>allear+x1
I have resorted to actively asking people to not tag me in photos.

>>wackro+(OP)
I know someone that did the initial internal report to Apple about this years ago. This is exactly what it is. They use your contact data to create what are essentially graph nodes in a database, even if you've never signed up.

Not sure how much of that has changed since then. But contact data is by far the most valuable mined from phones. Facebook is no exception.

>>nerdpo+W2
We reach.

But with ML facial recognition I figure the jig is up.

>>junon+7a
Probably FB has enough tech and data to recreate a virtual you as NPC in metaverse.

>>JKCalh+Sp
The jig is up.

https://en.wikipedia.org/wiki/Clearview_AI

>>Jansen+uu
"'Login with Facebook' today to claim your NPC in the metaverse" /shivers

>>politi+xv
Clearview is notable only for their brazenness. It's easy to code up face recognition these days if you have the data, and again, it's brazenness (in scraping) which is Clearview's main advantage here.

In general, AI that's hawked at CEO types and police is mostly snake oil, inferior to what you can make yourself if you read hackernews and are willing to dive into Arxiv.

>>dessan+B1
There's a reason Facebook paid billions for an essentially free (and ad-free) chat app and chose to leave it that way.

>>wackro+(OP)
Didn't LinkedIn once (ten years ago) ask for your email login credentials when you signed up?

I know it suggested my ex-girlfriend as a connection when I opened my account, five years after we'd last talked.