Real names in social media context collapse all the various versions of you into a single maximally safe version of yourself.

You can only have an alter ego online if you have a nomme de plume.

Otherwise you have to be the generic, socially-acceptable-in-most-situations version of you--the lowest common denominator of you.

We have fewer and fewer channels for truly private ideas in modern society, and that will hurt our resilience.

It will make innovation of ideas harder.