"H0w [...]" titles would be somewhat amusing and appropriate as a hacky way to bash those in, albeit inappropriate as being rather silly and circumventing this sort of policy.

The HN website editorializing titles automatically indeed seems wrong though: if those are bad or clickbaity titles, they probably could just not be upvoted much, maybe flagged, and otherwise dealt with using generic mechanisms, but attempting to automatically improve them does not seem to do much good. On a more optimistic note, at least those are predictable substitutions for now, and not any of the ML business.