Ask HN: FB suggests friends after visiting same city, don't use FB phone. How?
3 by shafyy | 0 comments on Hacker News.
Facebook suggested two new friends two days after we hung out together in a city. They are my co-workers. I moved recently to this city (4 months ago). I don't have the FB app or use FB on my phone, don't have this city set as my location in my FB profile and didn't check-in into a location on FB. I never allowed FB on my laptop's browser location access. I followed a page from a local comdy club, though. Other than that, I have WhatsApp and the Oculus app on my phone a. I have an iPhone. Any ideas how they know that we have been geographically close? Is it possible they use WhatsApp's location info to match this? I have given WhatsApp location access while using the app.