Facebook Using Physical Location to Suggest Friends
This could go badly:
“People You May Know are people on Facebook that you might know,” a Facebook spokesperson said. “We show you people based on mutual friends, work and education information, networks you’re part of, contacts you’ve imported and many other factors.”
One of those factors is smartphone location. A Facebook spokesperson said though that shared location alone would not result in a friend suggestion, saying that the two parents must have had something else in common, such as overlapping networks.
“Location information by itself doesn’t indicate that two people might be friends,” said the Facebook spokesperson. “That’s why location is only one of the factors we use to suggest people you may know.”
The article goes on to describe situations where you don’t want Facebook to do this: Alcoholics Anonymous meetings, singles bars, some Tinder dates, and so on. But this is part of Facebook’s aggressive use of location data in many of its services.
EDITED TO ADD: Facebook backtracks.