I too live and dine in a small town. I have also watched bad restaurants come and go, hoping against all reason that they might actually some day get it. I am now of the opinion that a quick death is to be preferred. Hold a nice wake and hope the next contestant might know how to cook and or serve. Criticism is for a less than good reduction of the demi, not how to avoid turning my meal into charcoal. Translate the parade of horrors you described to any other profession and you wouldn't be talking "how do I give them gentle and loving criticism" it would be more like who wants to call the cops first or where the hell are the state/federal regulators? Those are clear indications that those people should not be allowed into a restaurant - not even to eat.