HN is indeed one of the few places in the web that I think maintains a more community-like platform and it's a home for me too. However I think how reasonable is the general ethos depends on the topic. It goes without saying that tech is it's strong suit, so the 95% figure (which I read as "the vast majority") is reasonable. For other topics like social problems, civil liberties and personal responsibilities is way less reasonable than that, I'd say half-half...

I have fun with a friend of mine sharing ridiculous comments on such topics and there is no shortage of those.

I have to give props to the moderation though. More often than not, these comments are flagged and die really quick.

https://news.ycombinator.com/item?id=44531605

https://news.ycombinator.com/item?id=44258152

https://news.ycombinator.com/item?id=43841812

The list goes on...