I think that the wiki, just like in wikipedia, should cite sources more. If there's an event that's mentioned in FS2 retail, it should have a citation saying (FS1 Retail) or (FS2 Retail) or even mention the developer comments or interviews it came from. If it comes from a mod or fan-created campaign, it should do more than just mention that it's non-canon, but also cite what it comes from in particular. This has the advantage of not only giving the reader a more informed understanding, but pique his interest in a campaign or mod he could enjoy. It might also be prudent to list conflictory non-canon stuff and cite them, instead of just posting one non-canon source. I know that when I finish my campaign (one day far-far away) it'll contradict a great deal of other non-canon lore.