When I was at Sprint I heard the story of a cut fiber line. They go to check out the location and the ground is disturbed where the cut is. The tech thought the culprits left before they got there. When they dig down they find a dead decaying horse. The farmer buried his horse on the edge of his property without knowing he cut the fiber.
Another farmer put up a new fence and used the fresh laid fiber line as a guide. He proceeded to cut the fiber numerous times over a half mile with his fence posts. Talk about a costly fence post error.