Indiegogo for "Drone Shield" gets fully fundedSubmitted by fishyculture on Fri, 05/03/2013 - 09:13
"DroneShield: A low-cost, easy-to-use device that alerts you to nearby drones.
DroneShield is a device that detects the presence of nearby drones (including RC helicopters, quadrotors, etc) and issues alerts via email, sms, and/or a flashing light. The goal is to help preserve your privacy from low-cost remote-control air vehicles with video cameras."
You can still donate and get yourself one!