[dogorman]

Not that I don't support warning disclaimers on facebook, but "designed to manipulate your emotional state" certainly applies to all movies, music, most books, etc. A big difference between these things and facebook is that facebook is reactive. It constantly measures your emotional state and modifies what it presents you with. Movies, music and books don't do that (yet?)

Facebook reacts to you reacting to facebook; putting you inside a control loop. Facebook is more akin to a car salesman than a movie director; a car salesman who knows virtually everything about you because he's MITMed your social interactions for years, and can modify his individualized approach to manipulating you minute by minute.