Vetting advertisements for a magazine is always a little tricky. Editors have a financial responsibility to keep the publication going, and it’s a fairly well-established practice in the trade to accept ads that don’t necessarily match the magazine’s editorial line—I suppose on the principle that if, say, the people at MoveOn.Org somehow believe their money is well spent trawling for converts with an ad in the John Birch Society’s newsletter, it’s not the business of the John Birch Society to correct them. Still, there are limits. Take, for example, the ad on page 36 of the December 5 issue of...