That's true, but that's probably due to the highly polarised content of niche political sites.
What I am saying applies to sites that attract a mixture of people with different politics, gender, age, class, skills, etc. There are many different kinds of people that read the Guardian, and I'd bet that very few of those that disagree are actually 'trolls' - they're just people with different perspectives and experiences to the main audience.
On sites such as the Guardian and Hacker News you can often find an opposing viewpoint to the main article - just like you provided here.
What I am saying applies to sites that attract a mixture of people with different politics, gender, age, class, skills, etc. There are many different kinds of people that read the Guardian, and I'd bet that very few of those that disagree are actually 'trolls' - they're just people with different perspectives and experiences to the main audience.
On sites such as the Guardian and Hacker News you can often find an opposing viewpoint to the main article - just like you provided here.