Personally I think it's a harmless but also not useful affectation (but I also think our chances of making it into the 10,000s as anything still using equivalent dates are slim at best).
It's not harmless. 1) It's annoying. 2) It's off-topic - this isn't an article about the long now, or about dating systems. 3) It's inefficient to write dates not in the standard format - it makes everyone waste mental energy trying to figure out how to parse it.
The third point is especially bad for this article, where in context, the assumption should be that 0xxxx is octal, which isn't what he's actually doing at all.
So the upshot is that, rather than efficiently communicate what he's trying to say on this topic, he'd rather grind is axe on an unrelated topic. His choice, I guess, but I think it's a bad one. And an unfortunate one - he's got really good information on this topic, and his choice has hijacked us into talking about his date format.
And, thinking about it, it's not really the "long now". It's more like the "medium now". If it were the long now, he'd have several more zeroes in front.
Despite the fact that they've got a point, in my opinion (which I won't try to impose onto others, be reassured), I don't how it could considered harassing. He wrote one comment, that's all. Also, that comment didn't talk about haircuts or clothes, and I don't see how they could be seen as antisocial through that comment.
Antisocial? If you do something in public, I can complain about it in public. If the complaining can be antisocial, so can the doing be antisocial. So think well before you throw that charge at me.
Personally I think it's a harmless but also not useful affectation (but I also think our chances of making it into the 10,000s as anything still using equivalent dates are slim at best).