Melissa Healy

Don't think of it as another tax. Think of it as tough love from Uncle Sam.That's how Melissa Healy tried to sell Los Angeles Times readers on the notion of junk food sin taxes in her July 27 entry -- "Tough love for fat people: Tax their food to pay for healthcare" -- at the paper's Booster Shots blog:When historians look back to identify the pivotal moments in the nation's struggle against…