I agree that nobody should be outright blacklisted from ever receiving an ambulance, purely on the basis of previous/regular abuse of the service - but is there no triage done over the phone?
Supposing somebody rang 999 and said that their telly had just broken, so they needed an ambulance (can't afford a taxi) to take them to hospital, so they could watch the one in the waiting room there, surely you wouldn't send an ambulance? Or is it that people who call will just lie about (non-existent) sudden chest pains or something?
It is infuriating, but it can't be much fun for the frequent flyers themselves, who must surely be suffering quite badly with their mental health. I've heard of people calling on average five times every day - regardless of the waste of everybody's time and resources, their whole waking lives must be consumed with calling and travelling back and forth in ambulances, waiting to be seen by HCPs in hospitals and then planning their next emergency call. It can't be any kind of life. I'm surprised that they're considered capable of living independently, to be honest.
I do wonder why there's only a blanket policy with ambulances being sent to everybody requesting them, when that most certainly isn't the case with the police. People often struggle getting the police to come out for quite serious crimes; but going on the same principle as the ambulances, it sounds like they'd send a police car out every time a 999 caller reported somebody stealing their mug at work or kicking at their fence.
How come 'wasting police time' is a chargeable offence, but 'wasting ambulance resources and paramedic time' doesn't seem to exist?