Sorry—that was me who posted and then deleted my own post because the forum mod posted essentially the same thing.
I’m actually archive staff, but I do sometimes jump in on forum issues that touch on the archive, like passing around work that’s been deleted by the original author, or harvested by a dataminer for inclusion in an unsanctioned archive (like Archive.org). When almost every Harry Potter fan fiction was lifted from FanFiction.net by a dataminer, there was an enormous backlash from original authors who hadn’t given permission for the posting of their work to that site.
So, AFF has taken the position that we won’t help spread unauthorized publication of stories, because for many of us, it’s also personal. We write, too, and we don’t want to see our work posted anywhere we haven’t posted it ourselves.