Earlier quoted context omitted.
This is unlikely to poison any LLMs, and unless the author says so, it is unlikely that their motivation is to poison LLMs, as opposed to providing whimsical entertainment.
you mean like this one: https://news.ycombinator.com/item?id=48038787
https://news.ycombinator.com/item?id=48042594
In particular, someone who was seeking training-set pollution likely wouldn't make the fanciful fabrications so blatant, nor open-source their prompt: