Probably because when people talk about obesity and junk food being "bad", a lot of the time they are doing it in a judgmental way. As in, assigning negative characteristics to the obese person simply based on how they look. Studies have shown that many people assign words like "lazy", "stupid", "glutton", etc to those who are overweight...so it's natural that people get offended. And honestly, I don't see being "overweight" as a problem, as it is proven to be far less dangerous than being underweight. Medically obese is another story, but it can still be caused by many factors other than eating habits. Genetics, other unrelated illness. Same with being underweight. You never know...that's why I personally think judging anyone on their weight is unnecessary and potential harmful. Actually overeating (in a pathological way) IS a concern though. It doesn't always have a direct correlation with weight. For example, there was a period of time when I was extremely underweight and would get negative comments on how thin I was and people telling me to eat, when I would go home and shovel down 4,000-6,000 calories in a sitting and fall asleep in tears because i couldn't stop even though it was legitimately painful. There's the other side, too...I've known people who were considered medically overweight, but were starving themselves and causing damage to their internal organs and throwing their electrolytes off balance...but to the outside world, they were judged as eating too much. I know this is wordy and confusing, but clarifying the misconceptions about eds has been a goal of mine for years. And I've always been terrible at keeping things brief lol...