They've tried to disguise surveillance drones as hobbyist crafts, so as to not scare your weak ass. And if you play video games, you can control drones that kill innocent people, and even get MEDALS for it, just by joining the military! Just LIKE CALL OF DUTY OMG! You can read about that at your own leisure.
And only if you guys stopped the cancer from spreading. Now it's at the head.
