It's easy to miss the "opinion" text because it's not in the title or the content, you need to look at the top and when I'm clicking on an article I'm not interested in anything other than the article. The word opinion needs to be in the first paragraph or in the blurb, a screen reader worth it's money is going to skip parts of the page that are not the article. Even Town Media "articles" make sure to put opinion in the blur or first paragraph.

I do look to Al Jazeera whenever there is a major event, I compare it's reporting against BBC and CNN. But Al Jazeera has a bias, just like CNN, just like the BBC, just like CBC, etc.