Since I appear to be the only one who did not approve of rule C, perhaps I should explain my objection.
It sounds well and good at first, but what does it actually mean? "Primarily" implies exceptions exist, and "It is a research aid more than it is a trivia collection" implies it still is a trivia collection...so what's the purpose of making these distinctions, particularly since no action based on these distinctions is mentioned? B.1 covers the more obvious "non-comic-related" trivia material, and B clearly states that such things will not be included in the index....
...so what is the purpose of C?