Nah, your "flame war detector" validates it. Am I expected to believe a site that looks a lot like Craigslist and has no extra features like email, favorites, etc. has the ability and competence to properly code a flame war detector?
Or is it more likely there is a basic filter that blocks conversations against the interests of said party? Forums are transparent, when threads are locked /deleted / moderated it is egregiously obvious and publicly visible. HN operates Gestapo style and then tries to gaslight you that nothing happened.