We used to have meter readers running (literally) from house to house jotting down the numbers.
They have vans with very visible PVC pipes mounted on the roof to interact with the meters.
That's more likely a fiberglass antenna.
And to make it worth my while I can just war-drive around the swanky areas of the city.
But the draw will be very consistent.
If you could design an algorithm for your wardriver gear, you might be able to detect when growers switch from 18/4 to 12/12 hour light cycles.
A lot of the all-in-one “grow lights” aren’t well evaluated, but I’m sure some out there get the job done.
Also, please excuse my pedantry, but it is impossible to rob an unoccupied dwelling.
The data was always "out in public" anyways.