“Let me spell that lesson out as bluntly as possible to anybody tempted to pull Horizon’s kind of stunt: If you’re too dumb to understand that sites like Twitter merely make public the things customers already say to each other in private — and that the only sane response is, at the very least, to act like you’re listening to their concerns — then you’re too dumb to be on the Internet in the first place. Go back to watching TV.”