The problem is that the norm of the politics-ban is quite broad. Basically everything that the "Personal is Political" crowd would label political is swept in.
Not only is discussion of the latest maneuverings of Newt vs. Mitt prohibited, but discussion of democracy vs. authoritarianism, feminism, the purpose of juries, etc. are considered off limits by a vocal portion of LessWrong. I have no desire to debate whether Obama's State of the Union was good policy or good politics, but the broadness of the negative reaction excludes a lot of conceptspace, to the point that there are real world problems it's very difficult to discuss here.
In short, there's a reason why I was talking about a Political Theory Open Thread, not a Politics Open Thread.
Summary: I propose we somewhat relax our stance on political speech on Less Wrong.
Related: The mind-killer, Mind-killer
A recent series of posts by a well-meaning troll (example) has caused me to re-examine our "no-politics" norm. I believe there has been some unintentional creep from the original intent of Politics is the Mind-Killer. In that article, Eliezer is arguing that discussions here (actually on Overcoming Bias) should not use examples from politics in discussions that are not about politics, since they distract from the lesson. Note the final paragraph:
So, the original intent was not to ban political speech altogether, but to encourage us to come up with less-charged examples where possible. If the subject you're really talking about is politics, and it relates directly to rationality, then you should be able to post about it without getting downvotes strictly because "politics is the mind-killer".
It could be that this drift is less of a community norm than I perceive, and there are just a few folks (myself included) that have taken the original message too far. If so, consider this a message just to those folks such as myself.
Of course, politics would still be off-topic in the comment threads of most posts. There should probably be a special open thread (or another forum) to which drive-by political activists can be directed, instead of simply saying "We don't talk about politics here".
David_Gerard makes a similar point here (though FWIW, I came up with this title independently).