I have a permit. I am not a granny. I have a head injury that affects my balance and chronic pain and exhaustion from it due to a car accident.  Some days I am better than others but I need my permit for shopping etc because it is altogether too painful to park further away. My head injury also makes it on some days (I am affected by barometric pressure) almost impossible to park properly in a regularly sized spot. 
I may or may not, depending on the day, LOOK like I have a disability. But I do. The number of cheaters is very small.  Why not stick to the subject at hand?