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by cr0sh 3050 days ago
> Aside from a farmer in a field

While not constant, farmers probably do have cameras "pointed on them" in their fields - land surveys using aerial and satellite photo capability are common. I'm sure competitors also overfly each other's fields using drones and whatnot to keep tabs on who is growing what and when. Plus there's the fact that some farmers use drones on their own fields for a variety of reasons (though this last doesn't really count).