I guess for HN OP should have refactored the title to be "Actually Portable Executable" but I thought the whole point of the title was that it's something we can interpret that has been "written in something else" which is fitting given what the article discusses? It's a direct copy/paste from the source and I don't think OP was trying to stand out in any unfair way.
I'm not blaming the HN submitter, but you can also see how bloggers can easily abuse this if whatever unicode characters they put in their title are allowed in the HN submission on the grounds of "it's a direct copy/paste".