Handicapped Parking
The other side of that is people who do have legitimate handicaps and parking permits and then get harassed because they don't fit somebody's image of what a handicapped person looks like. Yes you can have a legitimate handicap permit when you are under 70 and not confined to a wheelchair. Etiquette Hell has lots of stories:
http://www.etiquettehell.com/?p=2493&cpage=1#comments
http://www.etiquettehell.com/?p=3318&cpage=1#comments