Some people are doing things. There's an outfit at DIU (Defense Innovation Unit) called Rogue Squadron who's job it is to conduct counter-UAS research.
Beyond that, hacking into their WiFi or navigation signals. But how do you do that?
It doesn’t matter if you have mortal enemies, or if you aren’t doing bad things, or if it matters if the government spies on you.
What matters is that it’s possible. And it’s a very real possibility.
Watch out, maybe your wife will program a drone to kill you!