Good Neighbors, No Politics By Margaret Renkl The New York Times, 22 October 2016
A few years ago an app surfaced on Facebook that could identify how many of your friends were liberal and how many were conservative. One of my real-life friends clicked the button to see how her Facebook list stacked up and was shocked by the result. “I had no idea I liked so many Republicans,” she said. No wonder she was surprised. Facebook is very, very good at tracking our political leanings—and at serving up more of what it has decided we want.