Conspiracy against public healthTanya Giles, along with Kate Jones, gave Herald Sun readers an insight into why a third of Victorian students are overweight or obese. As they reveal, the average student eats three serves of junk food and a sweet drink at school every day.This in itself would be a recipe for flab – and, further down the track for many, diabetes or heart trouble – but it is only part of the story. What do they eat after school and when they are glued to one or the other of their e…