To everyone who actually scrolled down this far...
The reason I created this string, was because a Groundspeak staff member recommended it.
I emailed Groundspeak, and they said, "put it as a forum topic", but of course with much better grammar.
No, I don't need anyone to create me an account, I can do that myself.
Changing display names is what I think will free up space on the database, (fewer accounts taking up space from people who have ditched names they don't like). The text display would be simple, because it would be sort of like an avatar, displayed in logs. A simple text display retrieved from the user's profile, with a link to the user's account.
If this doesn't happen... then Groundspeak should at least make a program that deletes unused account.