I didn't even think of the Filppi's pic as as being a prison but I could see how it would look that way. The Building behind is their retail store. The only reason I can think for the fence is that I was on a six lane (with Bike lane ) street, so It's probably to keep folks from helping themselves to free "samples".
Speaking of prison, maybe I should go to Chino, nothing like cows, inmates, and antique airplanes...