> and those are far easier to game than physical measurements like wind speed or whatever.

I’m not so sure about that. I bet that we could tamper with an anemometer somewhere out in a field. Easiest is to put brushless motor with a propeller next to it and blow propwash on it. More technically difficult is to tamper with the signal between the sensor and the station, or MitM the station.

If you are careful and only modifying the measurments when the weather is already crummy they might not even suspect.