The key phrase for subjectivism is "mind dependent" so if you think other people's morality comes from their minds then you are a relativist subjectivist.
I just realized I don't think people should conform to their own morality, I think people should conform to my morality which I guess would make me a subjective non-relativist.
Less Wrong is extremely intimidating to newcomers and as pointed out by Academian something that would help is a document in FAQ form intended for newcomers. Later we can decide how to best deliver that document to new Less Wrongers, but for now we can edit the existing (narrow) FAQ to make the site less scary and the standards more evident.
Go ahead and make bold edits to the FAQ wiki page or use this post to discuss possible FAQs and answers in agonizing detail.