While screens of earlier MacBooks could be turned off with a single magnet, my 2020 Intel MBP requires both the left and the right sensor (around the tab and the enter key) to trigger at the same time to consider it closed. It would be nearly impossible to trigger that accidentally. For starters, you'd need to wear two watches..
Maybe this has been fixed in recent models, but ten years ago it was easy to experience baffling laptop sleep states if you happened to set a working macbook down on top of another, similarly-sized macbook with its lid closed.
