Laughable Fanfiction Mistakes

Have you ever read a fanfiction where you knew a lot about a certain subject involved, but clearly the author didn't? Have you seen your job, hobbies, or other interests misrepresented due to lack of knowledge, and you just couldn't help but laugh about it? Here are some examples from Reddit. I'd love to hear your own experiences in the comments!
Link to the original thread on r/FanFiction: / whats_your_favorite_fa... (some comments shown in the video have been edited by me for length)
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