In the "Day the Earth Looked Stupid" segment of The Simpsons "Treehouse of Horror XVII" episode, Kang and Kodos are able to enslave everyone because they believe it's all a hoax, a la War of the Worlds.
Picture from "The Day the Earth Looked Stupid" of Kang (or Kodos?) in the "Treehouse of Horror XVII" episode of The Simpsons.
Picture of the Destruction of Springfield in The Simpsonsn "Treehouse of Horror XVII"
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