A lot of people point out that being fat is unhealthy, which is true and being fat should be put in a negative light. But on the other hand, being bullied and therefore depressed because of your weight can cause health problems in the long run (mostly gastrointestinal ones, ulcers and whatnot). I think the pressure should be on the parents/teachers to keep kids healthy, not the kids themselves who don't know any better. Teaching kids not to be so superficial while keeping them healthy should be the way to go in my opinion. Later on, not getting laid should be enough of an incentive to stay slim.