I could not bring myself to read an article about education being pointless that has a grammatical mistake in the title, no less. If you make that mistake while slagging on education, I simply cannot give your opinions any weight.
Language is usage is language. Not only was clarity not hurt, the point of the title I took away was a reference to the Alice Cooper song lyric, which as spoken (sung) language, contains no apostrophe.
I'm not rabid about grammar - the rules should be a bit malleable, depending on context. But most grammar exists so that we can understand each other. If you have poor grammar, I will have a harder time understanding you and we will have a harder time working together. In fact, I will be less likely to want to talk to you, because I could instead be talking to people with good grammar, and when I talk to them I don't have to pause for those cognitive potholes where I have to puzzle out what they're trying to say.
I would suggest that it's your literalism (or, perhaps, if not grammar rabies, then at least excessive focus on it) that's the issue here, not the presence or absence of a punctuation mark in a transliteration of a song lyric.
The author may be guilty of not being conservative in what he sends, but your guilt, in not being liberal in what you accept, is, to me, much clearer.
The title of the Alice Cooper song absolutely contains an apostrophe: http://en.wikipedia.org/wiki/Schools_Out_(song)
Incidentally, I doubt it's a bug in HN, merely a lack of feature: