No, I meant SA.
The original emoticon behind those has a bit of a history. I believe it started out as a sarcastic/mocking/trolling smile emote on SomethingAwful, but was later taken up elsewhere and overused into meaninglessness, particularly on 4chan. Last I heard, the SomethingAwful forum tag for it was changed from :awesome: to :iamafag:, though I'll admit that quite a while ago, now (I don't know if it's been changed again). So it's... not entirely popular at this point in more self-conscious corners of the 'net.
For that matter, we definitely don't need one for each person in Gensokyo. Though I'll admit liking the subversion with Shiki's.