thanx glass-hopper. And I don't doubt a rule exists. That might even *specifically* say "metal detectors" in it. And I have a sneaking suspicion of how-that-came-to-be.
But here's a silly question: How (pray-tell) do metal detectors "disturb nature" ?
I'm sue if you asked enough bored desk-jockeys, that someone could dream up that it somehow harms earthworms or sandcrabs, in-some-way. But just as a question here
among our own ranks : How does md'ing "harm nature" ?