A human at the 4,000 feet in the air we usually fly is just a funny shape. We can Photoshop the final mosaic easily.
Only on super low altitude projects can humans be picked out and even then they are just tiny. We usually soot a 1/4 of a mile project and bigger. A human is just a tiny part of that.
Few customers want to spend the money for crazy high resolution imagery of the areas we fly. When we were playing around we flew my house with the drone. It was 200 feet up. Then you can identify individuals. We don't use the drone for commercial purposes. it would take a month of flying to cover the areas we cover in a couple of hours.