@eleanorrees
This one's pretty good too:

"Benjamin Jensen tells the story of marines training against a high-end sentry camera equipped with object-recognition software. The first marines, who tried to sneak up by crawling low, were quickly detected. Then one of them grabbed a piece of tree bark, placed it in front of his face and walked right up to the camera unmolested. The system saw nothing out of the ordinary about an ambulatory plant."

(from https://www.economist.com/technology-quarterly/2022/01/27/deception-and-destruction-can-still-blind-the-enemy )