Michael Bennet

Facebook is by far the largest of these social networking sites, and starting with its ill-fated Beacon service, privacy concerns have more than once been raised about how the ubiquitous social networking site handles its user data.

Every time you log in to Facebook, every time you click on your News Feed, every time you Like a photo, every time you send anything via Messenger, you add another data point to the galaxy they already have regarding you and your behavior.