I knew a grader operator a few years back, plowing a road, some guy pulled him over and gave him ch!t for going too slow / not letting him pass. He let them go ahead. Some kms up, they had staged and left.....so he plowed a 6 ft windrow of snow between their trucks and the road. Probably the last time they lipped off an operator, a couple hours of shoveling would have given them lots of time to think.