If these social network policies just end up forcing people to use less 'internetty' (all lower case no spaces with leet accents) pseudonyms online, like authors and movie stars, it will definitely devolve to where papers are required for everyone getting an account.

I certainly now manage a semi-new pseudonym (based on an old irl joke between me and a few friends) that looks like a boring, unnotable real name. I'm not sure how it will keep me from being an asshole on the internet.