Yes, Less Wrong could use some sort of Godwin's law analog, where a thread is declared dead or at least discouraged once it hits politics.
I think the general consensus is that we tread carefully when straying into political territory and tend to avoid explicitly political (certainly party political) discussion but that we don't entirely avoid discussion that has a political dimension. Taken to an extreme that would seem to preclude most topics of any interest or significance. Generally the standard of discourse is fairly high here and political slanging matches are avoided.
And I still don't consider it a political point that you basically fail at instrumental rationality if you overpay on your taxes.
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