The post for kombucha is borderline on the Community Wiki / call for recipes. Is the question refining a problem or extending a technique in a Question and Answerable way? Is the question explaining the poster's current recipe and asking for more recipes?
It is indeed borderline. In fact, most of the question does not need to be wiki:
I have been making kombucha for several months now. I use green or white tea, flavored with hisbiscus, peach tea or other fruity teas to the mix. Since the elderberries, and rosehips are coming in season, I wonder if adding some to my tea brew prior to straining it into the kombucha making jar would be possible and beneficial.
That's a perfectly reasonable, not-too-subjective question and I would not have made that CW (I don't think any of the other mods would have either).
But unfortunately, he then added this bit:
Also, I am interested in other potential combinations for delicious kombucha flavors.
And that makes it very similar to the much-debated green tea question.
As moderators, all we can really do is enforce the rules; the question asked for a "list of X", therefore it needs to be CW.
On the other hand, there were 5 hours between the time the question was asked and the time it was made wiki. If somebody from the community had chosen to edit out the last sentence of the question, and the author had accepted the edit, then it would have been fine to remain non-wiki. (I'm against moderators making such significant edits because in practice, the author will feel as though he's being forced to ask the question "our" way as opposed to simply being asked or suggested to).
As it is now, the question is basically a two-parter, which is already a problem in my book, but not actually against the rules; that being said, the second part is what makes it wiki-mandatory.
Unfortunately, Community Wiki mode is irreversible, so there's nothing more we can do about it now. However, at the moment, the question has no answers, so if the author is really upset over this (I doubt he is) then I would have no problem with him deleting the wiki'ed question and re-asking the same question without the last sentence. That's if it actually matters to him.