Drones are a growing threat for law enforcement and business security officers. Drones can deliver a payload to carry out surveillance, to capture data, or to disrupt networks. Drone operators could, of course, build a drone themselves without any geofencing hardware or software, or they could turn to basic hacks. The threat from these hacks will only grow as regulators make more use of geofenced-based no-fly zones. The heavy lithium-ion batteries in drones could puncture the skin of an aircraft wing, or smash the blades in an engine.
Source: https://threatpost.com/drones-breach-cyberdefenses/143075/