There is a respectable, if (we feel) incorrect, case to be made for the idea of raising taxes to lower demand for an activity or product that causes externalities. Politicians and economists who support this idea call themselves The Pigou Club, after the British economist who first suggested the theory.
No such respectability applies to the snuffling snouts that are trying to get into the ethanol trough. Appropriately, Arnold Kling suggests we call politicians (few economists there) who support this boondoggle The Pig Club. We heartily endorse this suggestion.