I agree with your point about helicopters flying low. As I recall at least one fatally crashed while filming and the film crew couldn't get permission from the

I agree with your point about helicopters flying low. As I recall at least one fatally crashed while filming and the film crew couldn't get permission from the FAA to use a UAV. That said; A 1-2Kg UAV can easily do expensive damage to an aircraft if a collision occurs, in addition to the obvious safety risks. Of course, the result is little different from a bird doing similar damage.