Morons are a fact of life - some people are morons all the time and most people are morons some of the time. There is nothing that can be done at all short of killing everybody in the whole world for their own good. And that could be considered a little drastic. I daresay some of the problem could be improved by outreach programmes and information leaflets and so on - I think it becomes an abuse when people call an ambulance that they know is not strictly necessary. The biggest help would be if you guys were able to try to explain, politely, that ambulances are only for emergencies and this is not an emergency, without the risk of (1) being assaulted and/or (2) getting complained about to a management that won't back you up.