posts and comments that talk about politics in the usual way full of biases, delusions, and strong emotions should be downvoted and discouraged
Wouldn't it be great if LessWrong were capable of doing that?
(My guess is "not really", because it's an antiprediction that an accurate understanding of politics will include some unusual and extreme-sounding positions, and the spread of such positions on LessWrong may make the site look bad, undermining its influence on nonpolitical issues that it's better-placed to affect.)
There is a tendency to downvote articles and commentaries with a political subtext with a remark on how politics is the mind-killer. I completely understand that nobody wants his mind to be killed, however, I disagree on the employed methods. I don't think anybody can really afford to ignore politics. It's a fact about any group of even a handful of people. Thus instead of shunning politics I think it's better to build one's rational defenses. Understanding that politics is a problem is only the first step. If you stop there, there will always be a big part of life where you are not rational. Therefore I suggest that, as long as it doesn't get out of hands, there should always be room for political discussions if not on the main site at least in the discussion section.