Under siege

Our cars have come under attack from a pair of crows. This is my neighbours usually black, shiny, immaculate car about 30 minutes after the attacks started. His is their main target, but they will move onto others. Apparently they are very territorial and attacking their own reflections. They are currently keeping this up through all daylight hours, along with loud cawing noises. We have been warned they may begin to attack people, I have slight anxiety about becoming Tipi Hedren!