deontological-utilitarianism
"Theoretically, no. In practice - we try to avoid leaving them in the open where demons can waltz up and slobber all over it unopposed if they're strong enough? Even if they're actually invulnerable, as best we know, it's just - a bit rude. Plus if it's out in the open proper a demon can just walk off with it if they're hardy enough, so that makes it harder to maintain. As far as taking the stone from the hut, though... We've not got much communication with Irrisen, but I think someone who'd have half a clue said that these huts are positively broody over the stones, the once, so...good luck with that? I'm not sure the hut won't follow you or us, at least. I'll admit that we haven't tried moving this part of the line yet; we're a bit focused on pushing in from the mountains and Ustalav - the Sarkorian remnants are a lot more willing to pitch in if they get a bit of land out of it, and frankly we want to have the option of telling Cheliax to go screw themselves, so we need to get the northern forts into positions that don't require teleports to get to.
"As far as whether the surroundings make a difference in effect - that's a big honking sort of? The shield's maintained by all the wardstones collectively, but the forbiddance is something that stretches between individual stones based on a bunch of math and magic that you'd probably want Genevive to explain even though I have at least learned how to apply it; if a stone goes down, then the associated segment of the forbiddance goes with it if the neighbor stones can't pick up the slack. Most of the time that's not really something they can do; having extra Wardstones in the network trades off against other important things."