By altering the title, you've taken something deliberately strong and watered it down. This isn't a situation where a different title better conveys the authors intent or content...this is explicitly an opinionated essay expressing exactly what the title summarizes. It is unnecessary censorship. Sure it is a word that commonly is considered vulgar, but it is also a word that has significant visceral meaning. HN shouldn't censor words just because they're strong enough to be offensive.
I disagree that it is a form of censorship. I think the title of the post linked is more click-baity than the HN title. I am more interested in this article as it's presented on HN than I would have been if I had stumbled on an article named 'Fuck Facebook'.