Do you mean something like, say, The Internet?
Facebook’s ability to figure out the “people we might know” is sometimes eerie. Many a Facebook user has been creeped out when a one-time Tinder date or an ex-boss from 10 years ago suddenly pops up as a friend recommendation. How does the big blue giant know?
... While some of these incredibly accurate friend suggestions are amusing, others are alarming, such as this story from Lisa*, a psychiatrist who is an infrequent Facebook user, mostly signing in to RSVP for events. Last summer, she noticed that the social network had started recommending her patients as friends—and she had no idea why. ... “I haven’t shared my email or phone contacts with Facebook,” she told me over the phone.
What could possibly go wrong?