Suicide Quadcopter

http://www.popularmechanics.com/military/weapons/a19552/the-kamikaze-quadcopter-from-hell/

"Israel Aerospace Industries has taken the quadcopter to its logical conclusion: They built a man-hunting flying suicide drone. The ROTEM-L unmanned aerial vehicle is designed to hunt down targets in urban environments and execute a suicide attack, blowing them up with hand grenades.

ROTEM-L weighs 9 pounds, carries infrared cameras, and has a flying time of 30 minutes. An operator uses a tablet to guide the drone. He or she uses the forward-fixed camera to search for targets—IAI says the drone is virtually silent at ranges of 200 meters. Once a target is located, the operator can activate the attack mode. ROTEM-L executes a high speed on attack its prey. Once in range, the drone detonates two onboard fragmentation grenades, destroying itself and the target. "

Well there goes the neighborhood.  Now people will see quadcopters and run in fear.