Ive got the same thing in the N.W. corner of my property. The neighbors property is an open field with nothing but grass and his niece wants to hunt the deer on my property. Ive told her not to shoot onto my property and not to cross the fence unless she calls me first and shows me blood going onto my property.
Get a couple pieces of plywood, paint them pink with no hunting and put them up on your side of the fence. h.h.