I had that same question, but it's not obviously the case. The article addresses the decline, saying that it's mostly that people aren't worrying so much about identity theft. That sounds plausible, since identity theft is not a top-of-mind issue among the privacy-conscious commenters of HN either.

That plus the fact that the article isn't obviously tendentious makes it likely that the title was chosen by the author to represent the survey findings carefully. If so, it's unfair for an HN submitter to invert it. What would be fair is to post a comment to the thread pointing out the possible discrepancy.