It reminds me of a line I wrote a few months back in an article about the IndieWeb idea of Webmentions for A List Apart entitled Webmentions: Enabling Better Communication on the Internet:
Possibly worst of all, your personal identity on the internet can end up fragmented like so many horcruxes across multiple websites over which you have little, if any, control.
Inherent in this idea is that corporate interests and others who run social sites can disappear, delete, or moderate out of existence any of my writing, photos, audio, video, or other content into the memory hole at any time and for almost any reason. And just like a destroyed horcrux, their doing so takes a bit of my soul (identity) with it each time.
A few years back, I decided to take back my own identity on the web and post everything of interest to me on my own website on my own domain first–a digital commonplace book if you will. Only then do I syndicate it into other communities, websites, or areas as needed. (Even this reply is on my own site before I syndicate it to yours.) As a result, I own a tremendously large part of my online identity (though even at that, a lot of it is published privately for myself or select small audiences).
I hope that as Equity Unbound continues and we explore the ideas of identity, public/private, and related topics, people might consider some of these ideas and implications and potentially work on expanding solutions for students, teachers, and the rest of the world.