I'm not going to comment about whether obesity is a disease or a lifestyle choice. I also don't blame others for their struggle to become less obese.
It does anger me when people make excuses for obesity (from the standpoint of "my obesity isn't affecting anything. It's my body). Yes, there is a study that says that obese people are less "costly" versus healthy people. But it's illogical. We are all better off if we can curb obesity, PERIOD. End of story. And while I don't believe in forced regulations (e.g. soda bans), it drives me nuts when people get defensive about things that are going to help us become healthier.
I believe people have choices and they are entitled to make whatever choices they want. But we as a society have become very, very irresponsible about steering people to the wrong choices. We are poorly educated food consumers, poorly educated about how to stay in shape, and worse off, we have built a society that enables this miseducation. That's the heart of the problem. I don't blame obese people, but it does frustrate me when obese people try to improve their lot and get bombarded with terrible advice and confusing labeling that make it impossible to improve themselves.