But is it really any different than 'sex sells'?
Perhaps if we narrow it down to titles only: https://www.google.com/search?q=site%3Anews.ycombinator.com+...
Even the submissions with "fuck you money" in the title since that is a linkbait-y term unto itself. I am of the opinion that unless you're discussing the word 'fuck' there is almost no possible reason to use it in a title unless it's to attract clicks and votes by eliciting an emotional response.
Whether it is or isn't appropriate is the topic of a separate discussion altogether. That would have to touch upon personal and community etiquette, professionalism, audience, and so forth.
I'm purely focused on the link-bait aspect. Using swear words in a title is in a way like gaming the attention economy by subconsciously tricking peoples' minds into thinking that a piece of content "grabs" them on some level, even before seeing that content.
What I would be interested to know is if there is data that shows that people up-vote those articles -- before reading them -- disproportionately more often than articles with no swear words in the title.
You don't think that's important? If you had put a lot of time into this presentation, were proud of it, and submitted it to Hacker News to share it with others (without realizing that some people would take the profanity as a linkbait attempt), wouldn't you be at least a bit upset if someone said:
"Why do you people keep linkbaiting by putting profanity in the title?"
If it were me, I'd probably tune them out and their (valid) complaints would go unheeded. But if someone said something like:
"That was a great presentation! I think it would be even better if you excluded the profanity though. To be honest, it's a bit offensive. But that's just me. What do you think?"
...then I'd be more likely to listen, and might change the title just because I couldn't fathom offending someone so nice. Wouldn't you?
At any rate, I just don't see why it would be useful for him to have specific examples in mind. What is the point in asking for that?
Now that said, there's not really much wrong with making broad assertions about the number of silver cars you're seeing without a more in-depth analysis. Chances are, nobody will care if you're wrong. There is something wrong with making a broad claim about things other people are doing without at least a little bit of evidence to support what you're doing. Just giving a list of search results and expecting others to find their own evidence isn't the best way to go about doing that.
I think that's pretty much what he means, but you can't blame the author since it seems to work. People here are passionate, especially when it comes to articles related to the human side of software development. Profanity can tap into that emotion fairly well.
So a formula for getting knee-jerk clicks and votes is to "bait" the user by using language that elicits an emotional response. :)