Here’s another reason why one should carry a “universal handicapped symbol” template (I’d say 18"x18" should be appropriate) and a can of titanium-white spray paint.
That way, if you noticed a car without proper handicapped sticker/tag displayed, you could graciously add one to their hood, trunk lid and doors. 'Cuz, obviously, that person FORGOT to have proper tags displayed. You’d be doing them a service, right?
I’m not really advocating this… because, it’s, ya know… WRONG!