I used to arrive for work early & sit in my car for a few minutes [enjoying the music] before going in, and seeing apparently healthy people park in the handicapped spots really irked me. So much, that I lettered some post-it notes: "Ignorance is a handicap, but not for this parking space" I really enjoyed slapping them on windshields, lol.
Now, the prevalence of phones that take video means that more rude people are being exposed. It helps to offset the fact that so many people seem unable to put the phone down, even for a few minutes. Clouds & silver linings, eh?