I would think it has to do with the invisible/nonexistent/impersonal nature of Facebook moderation. If there’s no face, if the site is designed so you never fe

I would think it has to do with the invisible/nonexistent/impersonal nature of Facebook moderation. If there’s no face, if the site is designed so you never feel like a guest on someone else’s website, you'll assume you’re in control of the social rules.