It's a common rule of the Internet that many of its horrid aspects wilt when deprived of their anonymity. Yes, YouTube comments are vastly, overwhelmingly stupid, but the reason that you don't see a similar level of idiocy at a movie theater is because there's a severe social penalty to being such a prat in public. Anonymity isn't the issue -- we all know people who are pleasant in public but raging psychotics on Facebook -- but proximity ...