I fly an MPP for local government. My county Commissioners asked me to fly around the local courthouse to see if it would scare the pigeons that nest/roost on the building. At first, while flying dangerously close to the building, it did pay off as the birds quickly scattered. However, during a subsequent flight, they scattered at first, then flocked together and began to circle closer and closer to my bird, not unlike the picture that the previous poster posted (quite a nice pic btw). Knowing an impact was imminent, I had to take evasive maneuvers, taking her straight up, as advised here in other threads, then quickly brought her home. I told the Commissioners to try something other than a drone to scare the birds away, as I'm sure that my Agency would not be as quick to cough another grand to replace her.