Comment by holoduke

I could make a 2 meter wingspan drone (plane) for under 1000 dollars. That drone will have a range of about 200km. An avarage airspeed of 100km/u and payload capacity of 5kg. It flies autonomously using GPS. It still can (to a lesser degree) without by using barometer and compass. You can use special equipment to spoof or disrupt GPS signals. But no way that will work on long distances. My point is. If you want to fly over an airport and drop a bag of eggs it's perfectly possible. Even with all the counter measures taken at such places.