Idea of blokchain in part is to preserve identity, but social network idea is opposite than that. Your topic is right, but i believe that its ones preference to be anonimus or verified on this network. Internet is wonderful tool, if we are anonime it presents real state of consience of community and if we are validated it boosts up security in system. Final wote is to give it option within platform, since you can already conect to steem with your existing profile on social networks.