I always took at least part of Zuck's infamous "dumb fucks" comment to be prompted by people violating what were such basic rules of social Internet behavior at

I always took at least part of Zuck's infamous "dumb fucks" comment to be prompted by people violating what were such basic rules of social Internet behavior at the time: do not post real, identifiable shit about yourself, do not use your real name, and so on. They were "dumb fucks" because they were, and were acting like, such Internet n00bs. Now that stuff's normal, in large part thanks to Facebook, and it causes all kinds of problems.