Facebook launched when I was in college, and we were taught to treat it as a way of sharing pictures with your friends. We never got any training on what to share, what not to share, how permanent an online presence is, or anything since we were the first to use that sort of thing. It was just expected that new parents would post everything about their kid on there. Because you had that illusion of that it was "just for your friends". Most other social media sites like Xanga acted that way, and were usually gone within a few years. I think we have a lot to learn from Gen Z about the implications of making everything public and the dangers of social media. Because I can tell you that us millennials never learned any of that stuff except from news reports and by making mistakes.