I had an uncle with a heart condition, and a valid handicapped placard. To look at him you wouldn’t know he was handicapped, and he always got the dirtiest looks from people. There are two kinds of handicapped, internal physical issues and external ones. Just because a person isn’t missing an arm or a leg doesn’t mean that person is not handicapped.
I’m with you all on wanting to leave a note (or nails) when I perceive what seems to me to be an injustice, but I would rather chill with a cup of Dr.T’s coffee and give the benefit of the doubt.
I am in favor of the ejection seat idea though.