I mostly agree.

I think we need to accept some false positives [such as foul language] in order to preserve a reasonable level of freedom of speech on HN.

Here I mean freedom of speech in the weak form, ie. that you stop posting something you truly believe, because of fear it will attract down-votes.

Useful ideas/opinions that occur in the long tail may offend some people - but I think HN is too uniform and PC without them.