Re:WhatsApp is going to share your phone number with Facebook
by wmkn on Thursday August 25, 2016 @10:57AM
(#12359481)
I am pretty sure Facebook also makes a friend suggestion to you when the other person searched for your name or looked at your profile at any time in the past. Maybe your neighbor searched for your name after you gave your phone number to them.
Re:WhatsApp is going to share your phone number with Facebook
by binarymax on Thursday August 25, 2016 @11:31AM
(#12359811)
I believe FB also suggests based on location. If both were connected to FB on their phones when meeting in person, the location metadata is used.
Re:WhatsApp is going to share your phone number with Facebook
by Nicholas_C on Thursday August 25, 2016 @11:39AM
(#12359892)
Facebook also does this for people I follow on Instagram but have zero connections with otherwise.
That night Facebook was suggesting I add my elderly neighbors as friends. We have 0 friends in common and I don't have Facebook installed on my phone (I just use the browser) so the only excuse I have is when they added me they must have some "share my contacts with Facebook" feature enabled. Now there's some forever connection between them and me on Facebook's servers even though I don't publicly link my phone number to Facebook, it's only added as a password/security recovery.