I asked yesterday this question about books on recent history of mathematics. At the moment I decided not to tick the cw box. The rationale was that I honestly thought there may be some answers better than others, and people should be awarded points for that.

Now I'm not convinced anymore, and I have also been suggested in the comments to make this community wiki, so I'd like to communitywikify it. The problem is that a lot of people answered and gained points from that, and I'm worried it may be rude to change the status now and let them lose their points, What am I supposed to do in this case?

Once or twice I've thought that something I asked or said was borderline community-wiki, so when I write something like that then I try to say "I'm leaving this non-cw for now because ... but will happily hit it with the wiki-hammer if it becomes clear that ...".

Making the question cw will only affect future answers, not the preexisting answers.

That's correct. If you decide to convert your question to wiki in this sort of situation, please also flag the post for moderator attention and one of us will hit the question with the real wiki hammer (which converts existing answers to wiki as well).

Note to moderators: if you use the wiki hammer, please remember to put it back in its place.

If you decide to convert your question to wiki in this sort of situation, please also flag the post for moderator attention and one of us will hit the question with the real wiki hammer (which converts existing answers to wiki as well).

Well, actually I was trying to do the opposite, so that people would not lose points.

Hehe, I guess I am Thor to Anton's Wotan. Just this morning he talked me out of smiting someone.

Lame^H^H^H^HWitty excuse for getting it wrong, no. 1

I picked "Wotan" instead of "Odin" because "Wotan" is an anagram of "Awton".

Lame^H^H^H^HWitty excuse for getting it wrong, no 2

You have to remember that the inhabitants of Britain learnt the names of the Norse gods from people who were screaming the names whilst whirling great huge battle axes above their heads. You can just imagine the scene:

Cei, a celt, is resting partway through a battle
Enter Hrothgar, a viking, screaming incoherently
Cei: Excuse me, old chap, but did you just scream "Odin" or "Wotan"?
Hrothgar swops off Cei's head with a single backswing
Enter Cadwal and Valentine Dyall[1]. Valentine shows Hrothgar a yellow card.
Valentine: Offside!
Hrothgar: Offhead, more like. What's offside?
Valentine: It's when someone is beheaded from a warrior who's in front of the last defender.
Cadwal: And another thing, you're only allowed eleven men on the field. I've counted six hundred and ninety-three so far!
Hrothgar: All right, I'll send one off.[2]

[1]: Google him.
[2]: Stolen unashamedly from The Histories of Pliny the Elder