That is a tough story but your point is correct, you never know when someone has a handicap. My wife has RA and she has difficulty walking so she has a handicap sticker for her car. If you know my wife, she is really tough, a retired Police Lieutenant from an inner city Police Department. She recently went to a store and she parked in the handicapped spot. A couple was nearby and the wife turned to the husband and said, see there's nothing wrong with her, loud enough for my wife to hear. Her response back to the woman was well maybe I'll take my leg off and throw it at you. The husband wanted to climb under a car and started yelling at his wife. My wife just walked away.