An 18-year-old college student has posted a video on YouTube that has had by now a few million views. It shows a quadcopter-drone with a mounted semi-automatic pistol, that fires at targets.
I'm not surprised. Mounting guns on drones is not new. What's new is that this is the small drone that anyone can buy and fly.
You thought cameras on drones were a possible threat?
If you haven't heard of it yet, go to YouTube.com and search for "drone gun". (I'm not including a link because any iterations I link might be taken down.)