It wouldn't necessarily be out of control. MediaWiki includes support for
permission controls and a bunch of
anti-spam features. The permission controls allow you to restrict adding/editing content to registered users, designate sysops who have roughly the same powers as forum moderators, designate “bureaucrats” who can create sysops, and designate developers (admins). The anti-spam features include content blocking for regular expressions (e.g. block any combination of characters like bad words, bad topics, bad url's, etc), spam blacklsit extension to add lists of known spammer expressions (e.g. spam urls) to blacklists, proxy block, and other extensions that can add more content and/or permission controls.
Effectively the wiki could have tighter controls than the forums. However in the sense that it would generate a large volume of information, yes, it would probably grow at a feverish pace for a while. Controlling that seems like it should be rather simple for sysops, they can lock pages, lock categories, move stuff around, bury pages about other games in a general “other stuff" category or delete them outright, etc... Abusive users can be banned by username and/or IP. Certain keywords (regular expressions) like “cloak” or critical parts of the INI code to make cloaking work could be automatically rejected when the user attempts to submit the content. Checking up on new content is easy too, just click “Recent changes” to get a full list. If you don't like the changes made to a certain page just revert it back to the previous version (takes like 3 mouse clicks), you can compare different versions of a page with a side by side list of changes by line number, and all revisions are tagged with a username/IP and date/time stamp.
I think overall content management and control would be far easier on the moderators than managing the forums. You wouldn't have to argue with people, reason with them, worry making the right choice in wiping a page, or even proof read for bad language. If you see something you don't like just hit edit page, click on the text box, ctrl+a (select all), hit delete, paste in a prewritten statement to the effect “Dear User: Please review the rules of our wiki (link) and revise the previous content of this page by reviewing the page history and then resubmit the content.”, and hit save changes. Simple enough...not to mention normal users can edit other user's content, so if someone submits something bad it might be removed by another user before a sysop even notices!
Think about how useful this could be for building a massive Freelancer reference library covering the original game, all mods, all tutorials, and on going projects. Openlancer will use it for primary development, mainly for writing content – storyline material. In time we could write whole novels based on the Freelancer universe and highly detailed manuals covering all aspects of editing, and it can be exported to PDF then downloaded like any ebook (or rather exported to XML then converted to almost any format).
Again, please reconsider.
-Burn
"Only the dead have seen the end of war"-Plato