@GraceNote I'm not sure. On one hand, they're not necessarily a problem, on the other, we do support them, and I've never seen any severe quality issues on them.
@FallenAngelEyes I'm not thinking on quality, just in terms of tag quantity. It's like the "indefinite-articles" versus "definite-articles" on English - sure, you could have separate tags, but is it an important enough distinction?
Is the post/back-story distinct enough from the during-story that it warrants a separate tag, is my thought. It might be, it might not be.