Because people like me and ember have poured sweat and tears into this wiki: https://rainclaws-ravage-fanfiction.fandom.com/wiki/Seasons_Of_Revenge_Fanfiction_Wiki
Don't worry about it. The chances of being discovered are small, and should someone make an unwanted edit, it can be easily reverted. In terms of site protection, the furthest you're allowed to go is protecting from unregistered users, which can be done in the WikiFeatures.