I don't think they're be too much "wrong" posting, maybe vandalism, but not enough people around to have incorrect information while enough around to correct said errant strings of text.
Personally, I envisioned a true Wikipedia style Defcon Wiki, but I have neither the skills nor the time to learn to do it myself. However, I'd be a contributor, editor, and promoter, especially if it was a good quality site.
Wouldn't it be nice to see a wiki page on I-Beam bomber runs, Sfcon Seasons®, BOR, the Feud formation, and maybe even The Star of India? There's all kinds of things that could be listed that would be helpful to new and current players.
"How much distance do I need to aerial nuke a bomber?"
"Can fighters shoot down nukes?!?"
"But I thought I saw it happen!"
"How do I get this dedcon recording to play?!"
"Where did these strange characters come from?!"
"Where can I find that awesome guide that somebody posted a while ago?!"
Edit: Perhaps IV could have someone create a proper site, link to/from the forums/main page? This could be done with each of the games, but I only care about Defcon (and Subversion, probably). We have a large enough community to create the pages.
Smoke me a kipper, I'll be back for breakfast...