(If you are looking for on-topic discussion then skip the first block)
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I had expected it to be treated as an attempt to solve a problem which affects the wiki not as a ridiculous attempt to score points off of me.

You know what, Kara? You're right. You are apparently going to have to revise your opinion of me, because I am not a pushover who lets people claim popular mandate with a vote that is unclear. In fact, I'm pretty stubborn.

You use phrases like "The fact is...". That doesn't make whatever you say after that a fact. I've pointed out that I misunderstood the question because the definition of non-canon (in this case) is "Anything outside the Freespace universe". I'm not sure whether I made this clear or not, so here it is:
Because we had discussed the possibility of removing user campaigns beause they, too, are non-canon I figured that was under discussion here. Essentially, any articles on the wiki discussing something of a fictional nature outside of the Freespace universe. Because we had not discussed articles such as the SCP, I skipped over it when thinking about "non-canon".
Then you made a post saying that assumption is wrong. You essentially said, 'No, I didn't actually mean what I asked...' and at that point I lost my regard for the poll because you didn't mean what you said, you didn't mean what I thought, and you didn't make that clear. Read Kal's post on the second page of the thread. According to you, regardless of the results of the poll, the Inferno article should be allowed in so why would he even mention it otherwise?
I should probably point out that I realize that even though I agreed with you that a poll on the Manifesto would be useful, I don't think that just because I agree with someone about something being useful, that it means that they're going to go right out and do it. It could be someone else, or they could do something else. This seems pretty obvious to me...I know of no religion or government law where this isn't the case

I do have to take something of a lawyer-like position here - I believe that having the Shivan Manifesto and other similar articles in the wiki is useful and outweighs the potential risks expressed by others. I don't believe that theories like the "Badger Manifesto", "Shivan BBQ", or "Spacecrack theory" sound like they belong in the wiki, but if they meet the same criteria as the Manifesto then I don't see why they shouldn't be put in the wiki. Since there are others that do not agree with this, I have to argue my case. If I've had a strategy in this, it's been to take the reasons that the other side uses as criteria for determining what goes in the wiki and point out how they apply to the Manifesto as well. Although that's rather un-lawyerlike.
I'm going to try to ignore any more personal attacks from now on.
What's the difference in Expanded Universe and Non-canon in the case of FreeSpace? Nothing.
The non-canon category is short so far. As soon as there are more articles, we can start dividing into subcategories. As soon as there are more campaign-related articles, we can further divide the non-canon category. I think something like this should do:
Non-canon (category)--> MindGames (category)--> Starborn (article)
Kara just explained exactly that; 'expanded universe' has a context and purpose within its use in campaigns and mods, i.e. it is canonical in relation to that creations 'universe'.
I don't see why the Manifesto has to be part of some 'expanded universe' to be added to the Wiki. It comes up fairly often in the community which IMHO is why it should be in there. In that way, it's more like the Freespace Lingo or Freespace Community pages, although I don't think it really belongs in either since it's more on the subject of Freespace. If you treat it as 'expanded universe' then you'd have to add half the posts in General Freespace to the wiki, if not more, since they would be just as valid as the Manifesto. And we've got stuff that isn't canon to Freespace or a specific Campaign in there that people have found useful. (See: SCP)
But maybe dealing with it as a Freespace theory is a bad way to do it. Possibly we could put the FS Lingo section into the FS Community section, and add a category in there for 'Community topics'. This page could have links to the Manifesto, Freespace 3, the whole incident with Derek Smart, etc etc.
There is a difference. If I put an article about the starborn in the MindGames (category)--> Starborn (article) section then I'm saying something about MG. If however I put the article in Non-Canon then I'm trying to say that the article is relates to other campaigns even though it quite clearly doesn't.
By putting it in the non-canon section, all you're saying is that it's non-canon. You're not making any kind of relation to other campaigns, unless you say that you are in the article text.