Hacker News has never been an anything-goes site. Tight moderation, considerate rules, and low tolerance for bullshit have made this a great site to talk about interesting technical topics and ideas. Remember that we all abide by the rules of the site, and that this isn't a magic free speech zone. If you want to talk political topics, the Internet has more than enough outlets.
Political discourse is antithetical to rational, intelligent discussion. This is not an opinion; look only to sites that allow political discourse (Slashdot?), or even our own comments to see how quickly rational discussion can devolve into flaming. One of the major selling points when I introduce HN to other people is the _absence_ of political topics or discussion: leaving the politics out just produces better technical content.
Also, please consider the idea that politics are regional and differ between countries. In Canada, where I'm from, many of the US political topics would never come up; many European countries might feel even more strongly. As a Canadian, I find American political musings and arguments even less relevant and noisy. By contrast, technological topics are always interesting to me - I can appreciate these, and I love that there's this corner of the Internet where I can participate in a reasoned, interesting technical community. Please don't ruin it with politics, especially the polarizing American variant.
I appreciate that the site is willing to take this step, and I sincerely hope it can keep this site useful, interesting and level-headed for the future.
In fact, what is antithetical to rational, intelligent discussion is: emotionally charged, poorly-considered, and dishonest discussion. The topic doesn't matter: health fads, operating systems, or taxes. I agree, many people have terrible style in their approach to political discussion - but see also, e.g. Hobbes and Rousseau for more thoughtful representatives.
I come to Hacker News not only for the submissions but more so for the discussion. I find as of late discussions populated with meaningless content. It seems people feel a need to communicate what they are thinking regardless of the comments usefulness.
I fall prey to this too. If my comments are short I do try to make sure they are helpful in some way. I will try to keep them on-topic and not filled with worthless opinion.
Yep. I feel like my first mistake on this site was to argue with every comment I disagreed with. Unless the comment leads to an instructive discussion, it's OK to just downvote it.
For a site that is ostensibly focused on intellectual curiosity, this is antithetical to that goal. A robust, informed discussion requires exposure to a variety of perspectives, especially ones that seem challenging or uncomfortable.
If you do not agree with a comment--so what? Either refute it or move on. Just because you are unable or unwilling to refute it does not mean that someone else will not come along after you and do so. Downvoting should be reserved for comments which are truly useless, not comments that you merely disagree with.
And, yes, I am aware that downvoting for disagreement has been promoted and accepted by some on HN, but it's wrong--at least, it is if your actual goal is to have robust, informed discussion of intellectually interesting topics.