I don't know whether you meant the submitted title ("A malicious vehicle can block "smart" intersections in the USA") or the current title ("One malicious car could trick smart traffic control systems in the US"), which was my attempt at shortening the article's own title* to fit HN's 80 char limit.

In any case the GP comment (https://news.ycombinator.com/item?id=40359800) broke the site guidelines either way; we're trying to avoid shallow internet dismissals here. They're not only uninteresting in themselves, they influence threads to become less interesting.

* in keeping with the site guidelines: https://news.ycombinator.com/newsguidelines.html