I genuinely want to know the real answer, because this kind of behaviour confuses me. And every time I ask someone about it they don't answer, or give a non-answer.
If HN blocked comments with certain words, I'd understand.
If you genuinely find fuck an offensive word, and instead chose to use some other word instead, I would understand.
But this makes no sense. Please be so kind as to explain.
You hear an analogous effect used a lot in spoken speech (definitely in the UK, not sure about USA), for example, "ff-<beat>-in' thing". This stresses it in a way, similar to varying tone or volume, that would be missed in a flat reading.
There are many better ways of calling attention, or adding emphasis to profanity without having to resort to making it look less profane.
And in the specific case of the comment I replied to it does not look like they were particularly angry or frustrated enough to apply this technique of yours to just one word, while the rest of the sentence is fairly innocuous. And I further doubt that if any (neutral) literary analysis were to be applied to that comment, that people would think that stormking was so angry that they were actually trying to apply any kind of emphasis the profanity.
> There are many better ways of calling attention
Written expression is a form of art, not a formula with a correct answer.