I think one case hasn't been directly covered is a question with multiple reasonable choices but it turns out that someone picked an (in anyone else's mind) unreasonable one.

Ask them not to.

I mean, just ask, if the GM has nothing planned in that direction or that is going to really conflict with someone's character or anything else, just ask and maybe they original chooser can choose something else they like the look of. If that doesn't work, see OldTrees1's post.