What killed Facebook for me was their creepy targeted advertising. About a year ago I saw an ad buried in my facebook feed to "buy Gallium and Bismuth metal in

What killed Facebook for me was their creepy targeted advertising. About a year ago I saw an ad buried in my facebook feed to "buy Gallium and Bismuth metal in Australia" I thought it was an oddly specific ad so I made a joking post about it - turned out several of my friends were seeing the same ad. A common friend we all shared who is a high school science teacher spoke up. He explained his class was studying the periodic table and he had purchased samples of Bismuth and Gallium online to show to the class. That was the eye opening moment for me if my friends and I can see ads based on another friend's online purchases what can my friends see about me? I've rarely used the site since then.