It's one thing to argue exactly how much politeness is necessary and whether a specific article meets the standard or not, but it seems ridiculous to write off the entire concept of politeness. If someone wrote an article arguing a point and included tons of expletives at anyone who believed otherwise -- even if they're fully right and it's about an important safety issue -- then the article probably isn't going to be good at convincing anyone who came in already believing otherwise. The article will just be cheerleading and a pat on the back for people that believed the article's point to begin with. (Sometimes that's useful to energize people who already believed the article's point, but in that case people should be clear that's the point of the article, and not delude themselves into thinking the article is something they can send to people to win them over.)