True. However, current drone usage is to fly over interesting areas. These areas are interesting because of natural beauty (ocean, lake, mountain etc) or becaus

True. However, current drone usage is to fly over interesting areas. These areas are interesting because of natural beauty (ocean, lake, mountain etc) or because of people. Crowds, Times Square, sporting events, etc. For example me using a drone at Park City filming my friends snowboarding has a much larger risk of hitting someone that on the empty desolate mountain 1 mile over. But no one flies drones over on that empty mountain because it is boring. I don't know what the percentage of hitting someone might be but certainly higher for current drone usage than flying a drone over a random city with equally spaced inhabitants. :) And kudos on your calculations, I had never seen this done before. This is the type of math that "news" stories need to have.