Sure, new-tech drones should respond to a targeted ping w/ serial number or similar. Simple challenge/response crypto could avoid cloning/spoofing. Enforcement

Sure, new-tech drones should respond to a targeted ping w/ serial number or similar. Simple challenge/response crypto could avoid cloning/spoofing. Enforcement of registration: no response = police will follow the drone to its owner and ticket (else impound). Physical serial number for legacy drones.