I doubt it. Google's heuristics are a lot more sophisticated these days due to SEO wars. If you blocked a website for just being spammy in one aspect, you could

I doubt it. Google's heuristics are a lot more sophisticated these days due to SEO wars. If you blocked a website for just being spammy in one aspect, you could be blocking a genuinely useful resource or even a website being targeted by malicious parties. I also doubt keyword stuffing in a single HN page would do much to its overall rank.