Okay, so Xantera basically hit the nail on the head there. We don't delete old and/or inactive member profiles due to the fact that on the off chance somebody would like to return at some point, they always have an account here and can always feel welcome. The other issue we could run into would be the issue of all the posts that some of those accounts had made, I personally am not sure what would happen, but any damage, no matter small or large is too much, and we would rather have the long list than potentially fracture the structural integrity of the threads.
As for a filter, I don't think we'd be against that idea, but we are limited to what we can do by what the forum software will allow, and I don't believe it will allow us to do this. Great suggestion though, we really do appreciate everyone who is trying to help!