My question here is sparked by a recent question on the Science-fiction and Fantasy Stack Exchange site: http://scifi.stackexchange.com/questions/3654/bitten-by-a-vampire-werewolf-and-zombie-what-happens-to-him. This is a question about SF from a writer's point of view. Technically, SFF.SE's FAQ refers to Writers for all questions about writing. However I'm not sure if this particular question is best asked on Writers, and I'd like to know the Writers community's opinion on this issue.
I think questions about the art or craft of writing definitely belong on Writers, even if they're focused on a particular genre (e.g. What breaks suspension of disbelief?, migrated from SFF, or For Fantasy Stories, Should You Include a Map At the Beginning of the Book?). I'm less sure about questions that are intrinsically about a particular genre, and that are more about reader expectations than writer technique. http://scifi.stackexchange.com/questions/3654/bitten-by-a-vampire-werewolf-and-zombie-what-happens-to-him is one example (asked on SFF.SE initially); Potential confusion: referring to home planet as "Earth" is another (asked on Writers).
From related prior discussion: "Is this realistic?" : Is that an off-topic question?, I gather that some questions about setting background (e.g. scientific or historical realism) are best asked to relevant communities.
So, mainly, as an SFF moderator, I'm asking where is the limit between SFF.SE questions and Writers.SE questions? There may be some overlap, of course. The SFF.SE community's attitude is more one of deference towards Writers — we're a consumer's community, we don't have writer expertise, but we don't reject writing questions per se, we just think they're better addressed on Writers.SE.
This is probably an instance of a more general question: what questions, while coming from a writer, are so domain-specific that they are better addressed by domain practitioners and enthusiasts?