Once you start to have a wider social network and meet new people (i.e., when multiple middle schools feed into a single high school, you can drive and develop

Once you start to have a wider social network and meet new people (i.e., when multiple middle schools feed into a single high school, you can drive and develop friendships with people in other districts), email-like messaging by real name because a killer app and Facebook dominates. I could not imagine, for example, navigating the landscape of my new college class of '17 online on a pseudonymous service like Instagram. Facebook is perfect for this.