I'm late to replying to this, but your response is the reason why many geeks don't get the problem here. None of what you just said makes any sense to my sister

I'm late to replying to this, but your response is the reason why many geeks don't get the problem here. None of what you just said makes any sense to my sister or my wife's aunt, both heavy Facebook users. "Cryptographically-secure", "MITM", and "social engineering" are meaningless phrases to them. They hear the word "email", and they think, "the Internet version of the letter I used to stick in a mailbox", and they make assumptions about the level of privacy their communications enjoy. They log on to Facebook, see a list of updates from people they know, and immediately have a feeling of close-knit community; it simply doesn't occur to many Facebook users that something like YourOpenBook could possibly exist. You and I understand and appreciate the subtleties of online communication. They don't.