Commentary Celebrities, from the C-list to the A-list, have been infesting politics for half a century now. Various halfwits and noodleheads have convinced themselves that because they lucked out in the entertainment lottery, landed a slot on some spin-off soap opera, or because their vulgar howlings won them a Grammy or its so-low-rent equivalent, a Gemini, or stole a moment of the “big time” in Vegas or Hollywood, that their burst of luck or happenstance and the odd appearance on Entertainment Tonight means they have “something to say” to the world. There are various motivations for the dumb celebrity to pontificate on world issues, decide to “support” some cause, show up at UN misery conclaves, and offer their star-studded, coddled, over-jewelled, botoxed, mammary-enhanced personas to the cause of the moment. In the old days such cleavage-scientists as Brigitte Bardot, the spandex queen Jane Fonda, lesser amplitudinous sex-kittens gave themselves to …