This article is from the Science Fiction Fandom FAQ, by Vicki Rosenzweig vr@panix.com with numerous contributions by others.
Two answers, one long, one short:
Discussions of actual science fiction will get more response
elsewhere in rec.arts.sf.* but aren't actually off-topic if they
arise out of on-going discussions here. But if you want to ask who
wrote "The Vitanuls" or for the name of the Brunner story about
the children who got born without any souls, please do it on
rec.arts.sf.written - and the same goes for similar media questions
in the appropriate forums. Mostly, what's inappropriate here is
what's inappropriate in general: spam and trolling. It's okay to
post "CON: Namelesscon, April 1, Arkham, Massachusetts" and tell us
where it is, who the guests are, how to register, and so on. It's
not okay to tell us how to Make Money Fast. And don't post that CON
announcement every day for a month, but occasional reminders and
updates are reasonable. (If your guest of honor has had to cancel,
or you've just convinced J. Famous Author to attend, sure, post
that.) Also, binaries don't belong in non-binary newsgroups, of
which this is one. Basic netiquette. See news.announce.newusers and
news.newusers.questions. There is no Cabal, but it seems to be
watching out for us anyway.
This is a social group--what is off or on topic is very hard to
define. (However, commercial posts are generally off-topic.) Your
best bet, as with most newsgroups, is to read the newsgroup for a
while and get a feeling for the place.
 
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