This sort of thing makes me want to join their shoot and not aim at pigeons if you get my drift.................
I'm not sure why they have stopped the fly in though. If anyone had found pellets in their aircraft, then a visit from the local plod and accusations of "reckless endangerment of aircraft" might have settled their hash.
Given that the useful range of a shotgun is less than a hundred feet, then I don't really see the problem.
If they were using 50.cal rifles, then I can understand it, but a 12 bore pop gun????
NIMBY's..........................