Would it be possible either by a script (or some other method that could be automated) to go in and delete all user accounts not part of our domain?  (Or- since all usernames get a DOMAIN\ added to their username, deleting anyone not having that as part of their name...)

The brief explination as to why: We've got some module that uses DNN User Accounts. We don't like this, but there is no way around that in the module at the moment, so we have to allow people to register.  We don't want them cluttering up our list of User Accounts, and DNN Authentication is turned off so they can't log back in using that account anyway.  They're single-use.  The idea was suggested that if we could automatically purge the users things would be kept clean, and we wouldn't run into any issues should a returning visitor decide to try to re-register and be met with a "name already exists" error, making them pick yet another username.  Kind of half-assed, but it's the best workaround we've been able to come up with.

Thanks.

That might work but it wouldn't totally remove those users as there's information stored about the user in other tables. I used to have a script at home that I used to remove users from all of the tables but I'm not sure if I still have it. I'll check tonight when I get home.