Not only unpopular opinions, but since here on hn we can receive down-votes for "low quality" comments, people who are not native english speakers might shy away from expressing their views (I speak from my own perspective here). I often find that anglophones can have lengthy posts ranting about the same stuff over and over, but when non english natives comment they tend to be more concise and thoughtful. I'm actually kind off miss grammatically incorrect sentences that have a valid point, those are much more common on other forums, in those cases the person didn't had to feel pressure to be down-voted just for bad grammar.