David McDonald set up the sticker when he was traveling from Miami to London on Wednesday, and more than one gullible fellow traveler fell for it.
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"At first, people were mad, then confused and then [they] laughed," he told ABC News. "After I was done video taping, I told them what I did and they all laughed and we acted like nothing happened and waited for the next person to try it."
McDonald, a customer service rep who works with graphic designers, said the idea came from a conversation with co-workers about the scarcity of outlets at airports.
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He took the sticker down when he left, but that's not the end of this prank. McDonald plans to do it again, and he's even selling them.