The Golden Rule strongly tends to influence judgment towards the direction of altruistic behaviour, without providing much room for ambiguity. To that end, decisions made by applying the rule will not be too varied, if at all.
Sorry, that is way too optimistic. It will never be a universal standard and I think that you understand that. Think of applying the same rule in Iran? Enough of this banter... You and I both know that anytime people make the rules, it can never be sustained. Feel free to apply your logic to other discussions...