Pretty sure there's a farmer in the Lockyer Valley in Queensland that does the same for their vege crops. The field near their house has a shed with the laser mounted on it. Fun part is they leave it on at night and the shed is right next to the road. It doesn't shine onto the road, but it is clearly visible and with shifting patterns and the movement on the vehicle it is pretty trippy. I'm not going to lie the first time I saw it there was a full five seconds where the most logical thing I could think of to explain it was that my skeptical self was having an alien encounter. Actually it was closer to ten seconds.