Once I was in the railroad cop's office in the superintendent's building and he showed us a video they had taken of people stealing cargo out of containers on a Z train. They stationed themselves in an area of heavy grade territory and when the train is down on it's hands and knees crawling up the heavy grade, they would jump up on the cars, open the containers and toss out anything they could get out of the container. Then others would collect the booty along side the tracks. That's one of the reasons that Z trains tend to be over powered now days and engineers are required to keep all engines online regardless of TPA requirements, so as to keep train speed up even in heavy grade territory.
Scott