The author is writing a title appropriate for the location the article is posted at. That context may be critical and is missing once the article winds up on HN.
The fixing effect is in my opinion positive.
I would say it is net positive, but that doesn't mean there aren't cases that are significantly negative.
The top news stories don't look like a shouting match where the scariest story wins.
This is a false dichotomy. We can have sane editing of titles that give us context without leaving shouting matches.
