> Serious combatants will not be using wifi/cellular 4G LTE drones
if you precalculated its path, you could probably navigate by inertial methods using gyros/accelerometers allowing you to be completely dark in the RF spectrum.
You probably don't even need to do that. Facial recognition is to the point where a drone can navigate to a predefined area and find a specific person before detonating. Especially in a situation like this where a politician is giving a speech at a very specific known location (i.e. behind the podium on the platform).
