We want to believe that we're invulnerable, and that people who get tricked deserve it. Well, they don't. And someday the arrogant types who mock the gullible are likely to get their turn to wear the dunce cap.
A diploma is a dunce hat in disguise.
DIVINATION, n. The art of nosing out the occult. Divination is of as many kinds as there are fruit-bearing varieties of the flowering dunce and the early fool.