A few of my favorites follow:

Imagine Swirled Peas

From the Nixon/Agnew days I remember, The Moral Majority is neither and now we have its more updated version: The Christian Right is neither

But I think my all time favorite is the timeless classic twist on the 'pearls before swine parable', Never try to teach a pig to sing; you won't be successful and you'll only annoy the pig.