If your bullet crosses a fenceline then you are tresspassing in my state as I would bet it is in many others. If you shoot across a fence then you have tresspassed and therefore poached an animal. I am not saying that you have done that but merely that if you follow your own principles about there being nothing wrong with shooting across a fence, then you have not only violated a game law but also one of the fundamental rights of our society, those of the landowner.