OK. If we can't jam them, how about developing scout drones designed to fly underneath the photo drone and take it out with an upward firing airgun. If the scout rotors were in the way then surely some form of interrupter gear could be incorporated in the system.
Some years ago I remember model rockets (Estes?) were all the rage. Could these not be developed into some form of home defence SAM emplacements?
Or maybe my 18 stone mate's solution of taking out an offending drone on the ground along with it's operator is the best answer to protecting ones airspace!