Drones come to the bee-hive in our home garden and waiting near the entrance pick the bees off individually, to take away to feed their young ones. I was advised to smash each individual drone, hovering near the entrance to the hive, using a cricket bat. I put up a small net to cover the entrance of the hive hoping to prevent the larger sized drones from going close to the entrance. I found the drone landing on the net and creeping inside.
I have a Chinese made electrified net mounted on a racket' used to kill mosquitoes. I used this gadget to give a 3000 volt shock to the drone leaving the hive. It vanished from sight and subsequently for the last few days I have not seen any drones near our bee-hive. He must have got 'the shock of his life' and cautioned his hive mates. I am waiting for further developments.