You could even launch it from an extreme distance away. Launch it from the middle of a state forest, in a different state from the target. Have it programmed to fly to a remote location at the limit of its range, then land in a discreet location. Charge its batteries via solar power, then go again. A drone could hopscotch its way to target hundreds of miles away with this method. If you’re worried about a drone successfully making it, then launch a dozen of them. You could even build in a self-destruct mechanism. If the drone ever becomes stuck, or if someone tries to pick it up or move it, have it literally announce “this drone will self-destruct in 20 seconds.” As soon as anyone picks it up, this sequence activates. it gives a warning and then sets off the incendiary. Every incendiary drone has a built-in self-destruct.