I've never heard of this trick before, but there's a really easy way to see whether the food in your fridge is safe to eat and all you really need is a cup, a quarter, and some water.
I'll be honest, I don't think I've ever seen this while driving around the Jersey Shore. However, it's something that we should think about starting to do because of the meaning behind the green porch light.
I'm not much of a thin-crust fan myself, however when it's called the best in the state by other sources like NJ.com, and the New York Times and has more 5-star Yelp reviews than you can count it's worth a try!