GET READY for the next mass-tort crusade: protecting our kids from the ravages of Big Cola. According to reports, a group of lawyers is gearing up to file lawsuits that will seek to blame Coke, Pepsi and others for obesity, tooth decay and other childhood health ailments. An article in the Boston Globe Magazine has called it part of a "national legal movement to make soft drinks the next tobacco." Instead of tar and nicotine, we'll be hearing about corn sweeteners and caffeine; maybe Dr. Pepper can stand in as the new Joe Camel. Ridiculous? More like inevitable. For some...