Suppose the whole Keurig's DRM idea is applied to automated farm equipment. Want to plant some seeds? They have to be from a given source. Want to plant a certain crop, you can't plant it unless it's treated with a given pesticide. Inline sensors detect exactly what you are dispensing.
This all works because if you want to automate the driving, you have to integrate with the dispensing of things: seeds, fertilizers, pesticides, etc. If you don't, you need a person
Of course there is a flipside where that can be used to prevent you from using illegal pesticides, as those same in-line sensors could prevent dispensing of undesired things.