I can imagine a comedian using an LLM to check if a joke or punchline has been done before, but that would require the LLM to actually work and give accurate information. Also if you are a comedian using an LLM, you probably don’t actually care about whether or not you are plagiarising someone, so I guess this is all moot.
My favorite LLM move is when you ask for a source for their last response, and instead of saying they aren’t capable of providing them, they just invent fictitious URLs.