What methods can be employed to neutralize surveillance drones?

Hello, Mande We can understand your concern because these small drones are indeed used for espionage. As drone technology becomes more sophisticated, many features of small drones are becoming more suitable for spying. As more organizations and institutions use these devices, our privacy becomes less secure. You can try to block GPS signals, but that won't probably do the trick, if the drone will be controlled directly, otherwise it may crash. But as long as those drones use 2.4GHz frequency to transmit data and for controls as well, the best way here will be probably a universal signal jammer, which will block all the video streaming and the controls of the drone.