I'd prefer "Wiki" over "Fandom" any day. The word Fandom, to me, has a negative connotation to it. I'd probably get used to it, but still. It makes more sense with the former since that's what we basically all are first and foremost. I do agree that it will broaden their horizons, but I think things are okay as is. Besides, people who don't frequent these sites call them "Wikis" anyway.