"Well, maybe an old married guy like you might not understand. . . ."

About ten years ago, I had a couple of new research students coming to me, so I asked them what they wanted to study. They said, “You won’t believe this, Ross, but we want to study Facebook privacy.” And I said, “You what?” And they said, “Well, maybe an old married guy like you might not understand this, but here in Cambridge all the party invitations now come through Facebook. If you’re not on Facebook, you go to no parties, you meet no girls, you have no sex, you have no kids, and your genes die out. It’s as simple as that. You have to be on Facebook. But we seem to have no privacy. Can that be fixed?” So they went away and studied it for a few months and came to the conclusion that, no, it couldn’t be fixed, but they had to be on Facebook anyway. That’s the power of network effects. One of the things that we’ve realized over the past fifteen years is that a very large number of the security failures that afflict us occur because of network effects.
    --Ross Anderson

Quote from:
https://www.edge.org/conversation/ross_anderson-the-threat