This question in meta: Must all claims be referenced has been a controversial discussion. Now it is a community-wiki (CW in the following text), and my answer deleted. I don't know whether one action turned it automatically to CW, or whether it was willfully turned into CW. From the meta of stackexchange on CWs I conclude, it wasn't turned automatically, but I might have overseen a possibility.
However, the Wiki-character doesn't play well with a discussion. At least, the discussion tag has to be removed. But I don't suggest that, I suggest to turn it back into a discussion.
In the current state it looks to me, as if somebody doesn't like the topic to be discussed. On said meta-SO page, the purpose of a CW is described as follows:
One of the goals of the website is to be a continually evolving source of good information. Community Wiki posts help enhance the wiki aspect of the site.
I don't see how this particular page could become a community wiki, especially, if diverging opinions (which where upvoted 5 times) get deleted. It is more like turning the page into a kind of official, undisputable faq.