A well planned gag can sometimes demonstrate a person's gullibilty, which some may argue is a symptom of their ignorance. Being duped by falling for an obvious trick is embarrassing for the victim yet hilarious for any observer who is not the butt of the joke. But, pranksters be careful while planning your next ruse because your antics could expose you as the ignoramus.
"The truth is, I've never fooled anyone. I've let men sometimes fool themselves." ~Marilyn Monroe