People are idiots. When I taught Emotionally Disturbed students, people who asked what I taught would say "How nice, you teach retarded children" and would be speechless when I shot back "No, not retarded, some are smarter than YOU!"

DH rolled my chair into an eye doctor, girl/receptionist looked at me, than my care-giver and asked "Can she fill out forms?" DH knew to keep his mouth closed.
"Why, yes I can." in my snottiest tones thinking I'm certainly smarter than you.

Before I was knowing, I talked a little louder than usual to a visually impaired aunt She (she always was a Pip) shot back, "I'm blind, not deaf." People are so ignorant, poor things.