We do get used for target practice alot by military planes, but usually between Natchez and Baton Rouge (from Naval Air Station in Chalmette). They use us because of our slow speed and relative size to naval targets.
I'm not sure of the normal incidence of crop dusting buzzes, but I personally have experienced the naval buzzing a number of times. Let's just assume this jerk was showboating and will pay the price for it.