The Wall Street Journal has published an article (behind a paywall) titled “How Pizza Night Can Cost More in Data Than Dollars.” In it, the WSJ examines subtle ways you may be handing over personal data to Facebook and other high-tech companies during a quiet evening at home.
One of those ways: shooting and uploading a photo using your smartphone.
Based on Facebook’s privacy and data collection policies, Facebook first receives your photo, caption, and tagged people. The photo can be analyzed to see what they contain — and due to Facebook’s massive trove of user data, it can identify people who are strangers to you in photos shot out in public.
But that’s just the first layer of data that’s collected, as there’s also a huge amount of metadata that Facebook gets its hands on as well.
Unless you’ve taken steps to block certain details, Facebook can also collect: location from geotag data, the date, the phone model you have, the exact device ID of your phone, your cellular/Internet service provider, nearby Wi-Fi Beacons/cell towers (which can be used to triangulate locations), and even things like battery level and cell signal strength. – READ MORE