How Facebook is sharing our secrets with the whole world
My guess is that most of them think they are just writing to their "friends" because they don't understand how to fix their privacy settings and have simply accepted the defaults provided by Facebook. There's a trend here. Privacy on Facebook has been steadily, inexorably eroding. To track the erosion, see the timeline posted by the Electronic Frontier Foundation, or a sobering animation created by IBM researcher Matt McKeon. What we're looking at is the implementation of a corporate strategy designed to maximise return for Facebook's owners.