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I would say that on wikipedia, no section should imply or contain a question, we should document the comments, questions, and thoughts of individuals commenting on the topic of the page.  I read ""Suitability for children"" within a subset of ""criticisms and controversies"" as saying ""one of the controversies has been over their suitability for children"", not ""are Biggles books suitable for children?""  Putting in a question mark by definition asks a question, while leaving it out means the section simply discusses a controversy.  But I'll just log a 3O (and see if I can find any further guidance).   (t) (c) Wikipedia's rules:simple/complex "