They can grow apples on other land. The world is hardly overpopulated and the rich don't own anything close to every parcel of land. Heck, the rich have no reas

They can grow apples on other land. The world is hardly overpopulated and the rich don't own anything close to every parcel of land. Heck, the rich have no reason to even waste drones defending their surplus landholdings, just as most owners of large tracts of land don't typically defend it against deer. As long as the non-rich don't interfere with the drones harvesting apples for consumption by the rich, why would the rich care what they do? Further, you seem to think the rich own most land. They may own most parcels of currently valuable land (e.g. Manhattan) weighted by land value, but that's not remotely the same thing. There are large amounts of land in the world which are currently laying fallow because there is no current use for them. E.g., Detroit is more or less abandoned (but well suited for industry), as are large amounts of flyover country which were formerly used for farming.