"That was my comment to one of the pilots that used to fly a Kingair in there. However apparently they're not allowed to, nor are they allowed to fence the strip."
Any farmer anywhere should be able to get a permit to destroy protected wildlife if in numbers that are causing problems.
And if they won't give you one, a 4WD with a Bull bar works wonders,
especially on an airstrip where you can go fast and nothing the authorities
can do about it. They soon learn to stay away from those paddocks