Now, a researcher has demonstrated a significantly more subtle and proactive remedy that doesn't involve shotgun blasts or after-the-fact arrests by law enforcement. It's a radio transmitter that seizes complete control of nearby drones as they're in mid-flight. From then on, the drones are under the full control of the person with the hijacking device. The remote control in the possession of the original operator experiences a loss of all functions, including steering, acceleration, and altitude. The hack works against any drone that communicates over DSMx, a widely used remote control protocol for operating hobbyist drones, planes, helicopters, cars, and boats.
Now that the information is out there I would expect to see DIY versions of this on hackaday pretty soon.