That is murky topic right there, a bunch of court cases pending on that topic. The argument being the air space,and how far, above your property. Oddly enough it ties to corner crossing on posted land. It is a hot mess topic. Be interesting to see how it shakes out. In FAA speak you do not even have to shoot at the plane, merely pointing at it is good enough for trouble. If your defense is,I hit his plane with my shotgun, so clearly he was buzzing my house I don’t think that will work? But I ain’t no lawyer and glad to say don’t even have one for a friend. Hah!