I don't think you really see what I'm saying. As literally written, they were presenting that particular section as fact. You may remark that I'm being excessively pedantic and that they were just writing a little sloppily, and you may be right, but at the end of the day the result is the same: each individual's mental model of the world is formed based upon the information they consume, and neither you nor I (nor scientists in the field) really know the effect this style of "news" reporting has on people at both the conscious and subconscious level.
Let me ask you this: hypothetically, let's say there was a way to enforce a law outlawing presenting speculation or opinions as if they were facts - do you think this would have an effect on society? I think HN would be a good testing ground for this experiment, but I don't sense much support for the idea.