I've never heard the banditry argument. But it makes sense. Assuming that some variety of Asimov's laws will apply to self driving trucks they won't be able to defend their cargo (beyond locking and calling for help) it makes sense that there would be some sort of security detail. I wonder if, in the style of Ned Lud, if the robbers will in part be the same displaced truck drivers?
It doesn't really make sense. Banditry requires someone to threaten. If there's no driver and the machine is locked in transit anyway, then all you need are doors where time to cut them open is greater than time for police to arrive and banditry doesn't make sense.
Without people you can also do tricks like electrifying the chassis, so anyone who tries to touch it gets an electric shock.
