I think it's more than that. I grew up overeating and overweight, and I didn't decide to do anything about it until I was in my late teens and my parents influence had worn off. It's funny because both my parents are twig-skinny, but I was at least 250lbs in highschool.Both my parents had insanely fast metabolisms and ate a ton of food just for therapy and because they could, and that ruined me as a child. I don't think either of my parents top 130lbs. No exaggeration.Since I went through puberty overweight that's the 'imprint' my body has chosen.I personally work with a personal trainer and my diet consists of 1000-1200 calories a day. (Note, I'm only around 5'2".) I've actually lost a lot of weight over the past 6 years on this routine, but I still struggle with the fact that my weight fluctuates and doesn't *stay* down and the fact that I'm burdened with a size 42 waist even when I'm only down to 140lbs. (No, seriously! It sucks. Granted I only get down to that weight maybe once every 2 years.)Nevermind that I run on the treadmill for 60 minutes a day at 5.0-6.0mph.My skinny counterparts exercise significantly less (often never) and lose weight with much less work. (My friend lost 15 lbs by doing 10 minutes of situps/day. In a week. I do at least 30 minutes/day and my stomach is still a big round jelly years later.) Hell, I gain weight should I even add something with dairy to my diet, or add variation to the diet. I've had live-in trainers to monitor me and, most importantly, to prove that I'm not 'cheating'. Trust me, I'm not.I am thoroughly convinced that if I had grown up skinny that I would be like my skinny counterparts and need to do very little work now to retain a slim profile.My point being, yes, you should take responsibility to a point -- And trust me, I do, but on the other hand a lot of it should be put on the parents shoulder. Your weight as a child/growing teen is extremely dictating towards your body type and ability to even lose weight when you get older -- Regardless of diet and exercise.Granted, no, this isn't a universal rule, but it's part of the problem and kids growing up with chemicals like trans fats and corn syrup in everything they eat isn't helping the cause either. Still, I believe this problem really makes the hugest impact on children whose parents are still arguably most responsible for their diet.