Did you know that overweight people pay more for lots of things? Health care is one. I bet you didn't know that many medical insurance policies did not cover doctors visits if obesity is discussed. Life insurance is another one that overweight people will pay more for. Many life insurance quotes require a physical to be done prior to issuing the policy and often that policy costs more if you are overweight.
Of course there is also those issues with airline seats that pop up in the news every once and awhile but they are often aimed at the severely obese people and not just those who are overweight. While the medical and insurance industry tend to penalize those who are just overweight.