I think the major point made by my RfC was that the addition of controversial material by one editor set off a major row, with edit-warring, wikilawyering, trolling and general unpleasantness. After discussion, the material was not permanently included in the article. As noted above, it's patently obvious that John Howard is not a war criminal, and including fringey attempts to label him as one is not useful to readers, without maybe some sort of balancing opinion about the fringiness of the attempts. Although one could always start off a page about Attempts to charge John Howard for war crimes, which would be useful for those few with a genuine interest. We have good articles on Flat Earth and Lunar Landing Hoax, for example.