A small part could keep a car off the road
A windshield wiper blade looks minor until it is missing. Without it, rain or melting snow can turn a drive into a visibility hazard; a replacement is not a luxury accessory but a necessary part. Where spare parts were hard to obtain, losing one could mean more than an inconvenience: the car might have to sit until another blade could be found.
That made a parked car’s exposed wipers tempting to take and easy to damage. The removable blade assembly was also compact enough to bring inside. Carrying it away turned a vulnerable piece of equipment into something the owner could protect rather than simply hope would still be there in the morning.
The routine shifted the risk indoors
The habit reflects a practical calculation: a little daily effort could guard against a problem that was difficult to solve later. Rubber exposed to weather can deteriorate, and a blade left on a car could be stolen or harmed. Taking it indoors reduced those risks, though it meant reinstalling the wipers before driving.
It was a small workaround for a larger constraint. When replacement parts are plentiful, leaving a wiper on the car is hardly worth thinking about. When they are not, even an ordinary component becomes worth carrying home.
