For social networks in particular, the "I don't get it, here comes the criticism" reaction is a good thing. If a new social network / app is going to grow a dev

For social networks in particular, the "I don't get it, here comes the criticism" reaction is a good thing. If a new social network / app is going to grow a devoted, core group of user evangelists, there needs to be a clear delineation between the in-group and out-group to help them adopt the network as part of their personal identity.