I've no doubt my neighbor would shoot my peacock if he wandered over there...he shoots great blue herons, sandhill cranes, Canada geese and any mammal that he can get a bead on...I know, because he throws the carcasses into the woods behind our adjoining properties, and my dogs drag them home. fortunately, Argos the Kool has kept his territory on my property...some people are just sphincters, and there isn't much you can do besides penning up your birds ;~(
Department of Fish and Game told me that it's illegal to shoot anything on your property without a proper permit.