Yeah, I have had a few of those myself!
At the company I used to work at, we had a BIG "No Solicitation" sign on the door. You couldn't miss it unless you were blind or stupid. Or both.
Well, one day this guy comes in selling paintings, of all things. Walked right in asking if we wanted to buy anything. Well, the receptionist was notorious for not tkaing crap from anyone. She gets up out of her chair, walks right past the guy and out the door, looks at the sign and walks back in and asks the guy in her best sugary Southern voice: "Honey, how long have you been illiterate?"
The guy looked like someone had asked him to explain quantum physics. She points to the sign and the rocket scientist says "I ain't soliciting nothing, I want to sell you some paintings!".
She showed him the door and told him to come back when he had bought a dictionary.
illiterate...buy a dictionary.
Hilarious!