Infographic of the Day: Privacy on Facebook Is Vanishing

Privacy has become an "opt-in" feature on Facebook--and that has massively changed the service.

Facebook privacy settings are eroding. But the scope and speed of that transformation has happened fairly quietly--maybe because we've never before had an infographic that lays all the changes out.

The chart was a personal project created by Matt McKeon, who by day is a researcher at IBM's Visual Communication Lab (where Fernanda Viegas used to work).

It's concentric rings show the groups who can...