Well, again, I'd question the need for clearly defined boundaries.

Woolf is completely cut off from the history and traditions of fanfiction as an evolving literary genre. I mean, I suppose it's a bad example, as she could have been secretly been a Sherlockian and going to Irregular meetings, but still. If we're not going to call Alexander the Great gay because he slept with men, then even if he took on all the mannerisms of Graham Norton (whom I have been informed is archetypally gay) he still wouldn't be gay. Those markers don't mean the same thing outside the particular context in which they signify.

I'd want to problematize the case of Judy writing for Sue as well, although not as much, since it's closer on several axes, I think.