This doesn't actually address the issue I feel there is in that HN is a fairly small group of people from a particular demographic. A site called "hacker news" with a heavy focus on technology and startups is surely likely to have some bias compared to a random sampling of the general population.
Any post added gets voted on and only a small number of the posts that get posted will get any real traction, do you feel there's no bias in the type of things that get to the front page?
As a quick example, how many of the frontpage articles do you really disagree with? Which ones are strongly against what you actually believe? I've just had a look and honestly there are none. Everything fits very comfortably with my general beliefs.
I have never felt like I was surrounded by enemies here.