Reply to "A Fact about Running without a Thermostat"

A friend runs a local auto repair shop. One year, right as the weather turns cool there is a rash of gardener's trucks full of lawnmowers showing up at his shop. I guess during summer, word had spread within that community that you should pull your thermostat and toss it in the trash. Well now that it's cooler out, in the early morning the trucks that sat outside all night would hop on the highway first thing and never get up to temp. There were so many of these cases that within the first week, my buddy would stand in front of the shop and before they even finished parking offer up his free advice, to install a t-stat.