Hi Mustang Lady,
I agree with you, My daughter is registered disabled, and we have the Blue Badge,
What happens, is that the parking bays for the Disabled, are closer to the shops and other amenties, and that is, I think, how it should be.
Where I live, there are some areas where we pay, and others that we don't, My opinion, which i've had printed in our local Newspaper, is that there's no reason whatsoever for free parking for Disabled people, they get Motorbility cars and various benefits, which add up to quite a lot, so there's no reason not to pay.
In the end though, its up to whoever owns the carparks.