In the Denver suburbs about 35 years ago, two neighbors had a dispute about a small strip of property. These were not subsistence farmers. They were not unschooled; one had a Ph.D. in the sciences. It got to the point that the Ph.D. was mowing his lawn with a firearm strapped to his hip. The local police were called repeatedly. I don't think that I ever heard how it was resolved, but it must have been.