I don't know maybe there are a few people two diodes short of a semiconductor.
However it isn't a new idea. They have been doing this since the late 1800's. In 1964, the USDA performed tests in which a negative electrode was placed high in a tree, and the positive electrode was connected to a nail driven into the base of the tree. Stimulation with 60 volts DC substantially increased leaf density on electrified branches after a month. Within a year, foliage increased 300% on those branches!
I have always noticed the grass grows better and faster below the electric fence. However this is probably do to two major factors. The first I don't weed eat near the electric fence and the cows don't like to get to close to the fence.
Now I do get free electricity a few times every year. It happens when lightning hits the fence or near it and all that free electricity flows all the way to the barn and house.
Just image the government cheating us on the purity of their silver coins. They would never do that. I trust every silver coins they put out. - well maybe-