> though not always or in all cases.
Nothing I read suggested that every case was a problem. Simply that over time, most of these types of comments aren't helping anyone.
> Correlation is not causation....
It's useless as a comment. Spouting that off, and then adding a sentence on how bad science reporting is is where I see this most often. Or, often, it's applies to the reporting, not to the actual study. Thus, the study is dismissed because of the report.
> If you're not paying for it, you're the product.
It's mostly useless in the way it's used. Your condition of justification is where it makes it mostly useless. I mostly don't see it used with justification. Just a mere comment mentioning this, followed by a general rant about the state of being the product.
> [citation needed] Appropriate when someone makes an extraordinary, unsubstantiated, and difficult-to-source claim.
This appears all the time as the only text to a comment. First, it's factually incorrect. A citation is not needed. Merely requested. Secondly, it's usually used as a passive-aggressive way to assert that you disagree with someone. Don't have a way to argue around something someone said? Just place [citation needed] in a comment. Thirdly, I see it often used when, in the course of simple discussion, someone presents a hyperbole. It's not meant to be taken literally. However, a reply will seek citation on that specific point. Finally, it's also often used in cases where someone used a subjective adjective to describe something. People get robbed, no one will argue with. However, say "Significant people get robbed", and people want a citation, despite the fact that significant does not mean majority. It's subjective to the discussion and the condition.
> Premature optimization
Again, in the context of HN, it's most often trotted out when people are explicitly exploring optimization.
People always forget that there is such a thing as mature optimization.
> Dunning-Kruger effect Sadly, far too often appropriate, IMO.
Citation requested. =)
> Logical fallacies As with "citation needed": the quality of discourse is served...
If the quality of the comment doesn't move the discussion forward, down vote it. You do nothing by replying with a statement of the logical fallacy. Unless I'm mistaken, up and down votes do not apply to comments you reply to, or to comments that reply to you. Regardless, if you comment on a worthless comment, you are doing nothing more than contributing to the slow degradation of the thread. If, however, the comment does contain redeeming qualities despite a wart or two (as we've all had happen to us), then work to bring the thread back in order.
And the end of the day, this "you deserve to be called on it" attitude is that of a passive aggressive vigilantly.