The theory goes that you would buy this ten-pack of magnets and then put them on someone else’s car to tell them to park better. This would, however, make you a much bigger asshole than someone who didn’t align their car in a parking spot to your specifications. A similar business-card-based product exists, but purchasing 100 of them might be even worse, as it implies you’re in the amateur-parking-cop game for the long haul.