Just to be clear, these are hidden prompts put in papers by authors meant to be triggered only if a reviewer (unethically) uses AI to generate their review. I guess this is wrong, but I find it hard not to have some sympathy for the authors. Mostly, it seems like an indictment of the whole peer-review system.
Back in high school a few kids would be tempted to insert a sentence such as "I bet you don't actually read all these papers" into an essay to see if the teacher caught it. I never tried it but the rumors were that some kids had got away with it. I just used it to worry less that my work was rushed and not very good, I told myself "the teacher will probably just be skimming this anyway; they don't have time to read all these papers in detail."
Aerosmith (e: Van Halen) banned brown M&Ms from their dressing room for shows and wouldn’t play if they were present. It was a sign that the venue hadn’t read the rider thoroughly and thus possibly an unsafe one (what else had they missed?)
To add to this, sometimes people would approach Van and ask about the brown M&Ms thing as soon as they received the contract. He would respond that the color wasn’t important, and he was glad they read the contract.