Frankly, it’s time for a “you are an idiot” discussion with the user.
In view of the users’ presumed general ignorance of computers, perhaps you can set his or her Tools, Options, Save Autorecover info to one minute, then set his or her normal.dot as read-only.
Not really what you are looking for, and retrieval is inconvenient, but its’ a quick solution! If this isn’t adequate, you may need to write some Document_Close() code for this user.