Closing is for when we're 100% sure that a question is unwelcome. "Bad" or "dubious" questions are for downvoting. Questions that are a roleplaying subculture's first question on this site are definitely to be given the benefit of the doubt.
RPing communities are integral to the roleplayer subculture of online RPers. If someone came here to ask about the history of OtherSpace's rule mechanics, that would be similarly on-topic.
Unless we're going to say that online RPers are unwelcome, we're going to have to be very cautious about closing questions that seem, to tabletoppers, to be off-topic.
For example, from the perspective of dice&paper roleplayers, the question about making armour seems like something we'd have no expertise in. Well of course we don't, if we don't welcome LARPers to participate and share their expertise. I don't know a damned thing about banded mail (it goes horizontal, right?), but it absolutely belongs here if we are going to accept LARP questions at all.
Ditto questions relevant to online RPers. If we drive them off, then of course we have no expertise. And, our tabletopper bias will make it seem reasonable to exclude such questions. The example about OtherSpace is a pointed example: most users here would look at such a question and think it's about videogames, or at best, about some trivia about an online RPing platform. In fact, OtherSpace runs on a Fudge variant, making it solidly on-topic. If we drive off online RPers, who here would know that?
If questions like this that are relevant to a roleplaying subculture have nowhere to call home, then we're not really the Role-playing Games Stack Exchange, are we?