When Mark Zuckerberg created Facebook, he designed it to be a nicer place than the real world. People you barely know are “friends”; people you have drinks with now and then, “close friends.” You get a notification if someone deems you a friend, but if they later think better of it and delete you, you’ll never know about it. You can approve of anything anyone does with the click of a button, but to register disapproval, you need to resort to words. And so on.