Even if you never sign up for Facebook they have your information in a "shadow profile"
theconversation.com/shadow-profile…
Facebook asks them for their contact list
Facebook sees
"John Doe - 555-1234"
"Son - 555-1234"
"Boyfriend - 555-1234"
Congrats you now have a profile and they know who youre dating and who your mom is
If you mom posts "at the Burger shop with son"
They know where you are and what you eat
This is bullshit