In discussion with Failbetter, we've been asked to specifically omit certain content from the wiki. This is the usual Fate locked stuff, but also some things they have coming up. I've started a page and linked it in the header. Wiki-restricted content
Currently, the plan is to give us advance notice when content is coming that they want to remain unspoiled. We will then update this page and treat that stuff the same way we do Fate-locked content now.
If anyone wants more information, or if this is unclear, I'll do my best to clarify.