Like, I pretty much write fanfic as a gift to fandom. It's my way of sharing the squee and thanking people for allowing me to be a part of the online community, etc. If I get fanart or podfic, I'm ridiculously pleased, because it's flattering and humbling that they were inspired enough by my fic to go there. I've also given permission for someone to archive a spanking fic I wrote (she was tickled, so) and I was pleased and proud that it made her want it enough to archive it.

However, its only fair to give the writer a heads up, if its just even for them to gauge how much of their work they want out there. Some authors are distinctly against their work being archived, because they want to control their own experience or they think that they might be found out and it can be costly to them.

So yeah, as long as the writer knows, and is able to decide how much of her fandom self she wants out there - because nothing gets lost online- go on with your bad self.