The video below shows some people trying to steal coal from a coal train in Poland. Not much more information on this other than reading the commends of the video where some people say that they have been captured by the police.
Apparently PKP (polish railway) are planning to use more drones/quad copters to monitor the train lines, where they will autonomously fly along streaming video back to a security operator. My only comment is that they probably need to include some zoom cameras on their quadcopters.