[monorailz]

I don't find it that improbable to think it may have been typed into the wrong page by the user. If you open a lot of HN discussion pages first and then open the articles they link to via the discussion pages in new tabs and you switch to read an article (like I do) and you then go back to comment on it, I can see how someone ends up commenting in the wrong thread. Especially, I think, it would be easy to make that mistake if you have a strong opinion about the matter of the article because if you get worked up and eager to say something about it, you might be more focused on the comment entry box and not notice that the title and other comments don't match.