Delete User without showing their posts as "Guest"

[nitromethane126]

Is there a plugin of some sort that allows me to delete a user, but still continue showing his posts as posted under his name, instead of having all his posts changed to posted by "Guest" ?

I have seen some forums where a user that no longer exists still has his posts shown as being posted by his username, but the username is no longer clickable to view the users profile.

I don't mind deleting users accounts upon their request, but only if it doesn't rename all their posts to being posted by "Guest."

Any ideas?
Thanks!