I try not to judge. I am not a skinny person either mind you. But now i know that obesity can be due to a myriad of factors, i try not to judge.
If they're fat/obese whatever you call it and they are happy then "good" on them. I'm one of those people. I can lose the weight, but can't maintain it and it therefore affects my mental health, the constant yo-yo'ing.
If your obesity is due to eating junk all day and its affecting your quality of life, then i tend to judge. Sorry!