"In the coal drivers strike, we did not have enough pickets at the beginning of the walkout to successfully close all the yards that were being struck. I organized what became known as cruising pickets. We could picket a gate, and let trucks that were still operating out of the coal yards so police would think the trucks were home free. We’d let the trucks get two or three blocks from the yard, drive up in cars, force the trucks to stop and pour the coal on the street. In several days, virtually all the coal truck driving operations had come to a halt. It was a bitterly cold winter, families and businesses needed coal. The companies caved in and we won."
The cruising picket. More familiar from kidnapping movies and the assassinations of Very Important People: let them get away from the precinct/home/coal yard, all seems good, and then... A black pile on the winter tar. As relevant now as then in a nation with 4 million miles of roads and a whole lot of things that need not be shipped.
Cunning, dissimulation, waste, and reminder that all's fair in hate and class war.