Back in the 90s one of these really screwed me up when I was trying to find my way to a new and super out-of-the-way neighborhood using my trusty Thomas Guide, which at the time was the gold standard for maps in Southern California. I’d got lost and was scrutinizing the map street by street to find my way again. The moment I realized I’d “passed” the trap street I went back to make sure I didn’t get lost again. Did this three times before I decided it was a bug on the map, not knowing about trap streets at the time. I still get stressed thinking about that trip.