Even from that link I can only tell that its been done once. I'm not sure i'm for or againts it but from reading that it seems like at least some people are for it, and no one seemed agianst it (as long as no content was lost, and consideration was given to forms of interaction that didn't involv e posting.) I just super searched on several terms (maybe I missed the magic phrase.) Are there other nodes besides the one you linked to on the matter? Either way it seems like it is a good idea and always has been, it would be more usefull to see reason why it hasn't been done. I would guess the main reason is programmer time, no one has volunteered to take it on.

Just my two cents as usual, but for me this is a yes vote, not a priority obviously, but opening up on used but registered names could be nice for new users. I would say the criteria would have to be not logged in after a week after creation, no nodes created, no home node content, and was created 6 months ago or more. Even a year on the last one would probably open up a good number of names. That should narrow it down to users who maybe registered a wrong name by accident, or just decided this wasn't the place for them.

Sorry, I was lazy. Here's a few more.

Removing user accounts Database Clean up? Perlmonks Zombies - Cleanup? Old, unused nick desired..

I seem to recall one or two other threads, but they didn't turn up on my super search for "old users" in PMD. As it happens, I agree they could be removed.

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Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?

"Science is about questioning the status quo. Questioning authority".

The "good enough" maybe good enough for the now, and perfection maybe unobtainable, but that should not preclude us from striving for perfection, when time, circumstance or desire allow.