The Wall Street Journal has brought up the tired debate over kids on airplanes yet again. An article in The Juggle blog asks whether there should be planes segregated into kiddie and kid-free zones. One well-publicized (and admittedly unscientific) survey last summer of some 2,000 passengers by Skyscanner, a fare-comparison site, found that nearly 60% of passengers supported creating special sections on flights for families, and some 20% hoped to see child-free flights. There’s an increasingly popular Facebook group called “Airlines Should Have Kid-Free Flights,” founded by a frequent flier from Boston who suffered through a flight from Los Angeles to the U.K. near a screaming kid, according to the…