While fan fiction is certainly a rather open field, there are some things that we would prefer to not see on WoWWiki simply because we feel it could ruin the Warcraft experience for our audience. This policy is an attempt at e.g. keeping the Protoss away from Ironforge and Diablo out of Molten Core. You are of course free to write fanfic like that elsewhere, but please, not on WoWWiki. In general, fan fiction is also considered personal material, so it is also governed by the personal article policy.