Thursday, 14 March 2013

The Seattle Windshield Pitting Epidemic


On April 15, 1954, Bellingham, Seattle and other Washington communities in the United States are in the grip of a strange phenomenon -- tiny holes, pits, and dings start appearing in the windshields of cars. Initially the Bellingham police department believed that the damage was caused by teen vandals using BB guns, but the pitting soon spread to Sedro Wooley and Mount Vernon, towns up to 30 miles south of Bellingham. Roadblocks were erected and all cars and passengers were searched but to no avail. The vandal's theory took a hit when the pits were found in the windshields of cars at the secure Whidbey Island Naval Station. Over 70 marines commissioned a search of the entire station but could find nothing no signs of a break in. Within 24 hours over 2,000 cars had been reported damages at distances 50 miles from each other. It became clear that this could not be the work of mere vandals. It also became clear that the epidemic was moving south, towards the major town of Seattle.

On the morning of April 16th, the newspapers carried news of the northern events to the residents of Seattle. by that afternoon the reports of pitting attacks were coming in. Everyone from domestic car owners to parking lots to second hand car stores to police cars themselves were effected. Vandalism ruled out, more disturbing theories began to be voiced, Sheriff Tom Clark suggested it was the effect of H-bomb tests in the South Pacific, Geiger metres were run over the windshields but responded negatively, further theories included cosmic ray damage, sand flea eggs, a shift in the earth's magnetic field or maybe, just maybe gremlins.

Seattle Mayor Allan Pomeroy wired both Governor Arthur Langlie and the President, Dwight (Ike) Eisenhower:

"What appeared to be a localized outbreak of vandalism in damaged auto windshields and windows in the northern part of Washington State has now spread throughout the Puget Sound area...  Urge appropriate federal (and state) agencies be instructed to cooperate with local authorities on emergency basis."

Finally the University of Washington sent a committee of scientists to survey 84 of the pitted cars and found the damage to be "over emphasized  and said they were probably the result of normal driving conditions, the fact that all pits were found on the front rather than the back windscreen lent weight to their conclusion,

Nevertheless, the King County Sheriff's department conducted their own "tests" on pellets that they claimed were found near some of the pitted cars, their report claims that these pellets reacted violently when a lead pencil was placed next to them, but not when a ballpoint pen was. Right..

The case was closed when the Seattle Police Dept. showed that in "attacks" the older cars had pits and the new ones, simply due to their nonuse, did not. The pits had been there all along, just nobody had noticed, if you haven't already pop on out to your car and have a look, there's probably a pit or two. (Please don't go examine someone else's car, trying to explain what you're doing will probably make you look mad).

This is a textbook (literally) example of what behavioural economists call collective delusion, or collective nudging to go by the work of Thaler and Sunstein.

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