Ah, the joy of Wiki. Anyone can edit. Anyone can revert. Only We can punish.
Oh, wait, that's not your standard Wiki.
If you want to edit any of my articles because you see a glaring error or you have something to add and you're pretty sure I would approve, go ahead and edit the article.
If you want to post an opposing view or comment on an existing article, start a new article <articlename>TheySaid. (I.E., RightSolutionInIraqTheySaid for the article
RightSolutionInIraq). Then add "(for a more irrational viewpoint, see <articlename>TheySaid.)" or something similar to the top of the main article. If your article isn't too outlandish, I won't purge it. If it's well thought out, I'll honor your work with a well thought-out response. If you make me change my mind, I'll make your article the primary one! If you have a third point of view, add it to the TheySaid article as a new section, and add a section header to the other arguments if necessary.
But there are no promises. If I think you're an idiot, I'll tell you to
get a blog.
If you want to write you own article, simply add it to the main page as the newest article. Follow the pattern you see on the page.