For example, many teachers have fed student essays into ChatGPT and asked "did AI write this?" or "was this plagiarized" or similar, and fully trusting whatever the AI tells them. This has led to some false positives where students were wrongly accused of cheating. Of course a student who would cheat may also lie about cheating, but in a few cases they were able to prove authorship using the history feature built into Google docs.
Overall though I'm not super worried because I do think most people are learning to be skeptical of LLMs. There's still a little too much faith in them, but I think we're heading the right direction. It's a learning process for everyone involved.