Given that you "paid" for your bus ticket with tax payers money i couldn't give a shit how you feel. 
You are quite the strain on the nhs as well. Perhaps volunteering for being neutered will be your contribution to society. Diabetes costs the nhs millions and is hereditary after all
Two things.
1. Not all people on benefits want to be there and many have paid a lot into the tax system, and are usually the ones penalised and get very little in benefits.
2. Diabetes is not necessarily hereditary. A family history may increase your risk but you are not guaranteed to get it. Similarly you can become a diabetic even if there is no family history. There are other risk factors that can cause it, such as obesity.
There's a history of type 2 diabetes in my family, both of my grandmothers having had it and both my parents, with it occurring in later life. Lifestyle and physical factors such as weight gain have played a part more than any hereditary link in their diabetes.
Apart from a reasonable level of biological study, having started a degree in clinical physiology many years ago, one of my friends has done a fair bit of research into diabetes and is currently working at UCSF.
On the subject of Obesity Harv, there are quite a few medical reasons, not all physical, why people can become obese besides thyroid problems. In general it is down to overeating combined with a lack of exercise.
I certainly don't agree with slapping V.A.T on food or increasing food prices to solve the problem, but I don't agree with obese people who are fat for lack of excercise and overating alone, with no underlying medical condition, having expensive treatment on the NHS, such as gastric bands, to fix their problem. Put them of forced diets. Of course, that will never happen because of their human rights.
Some airlines in the U.S do make very large people pay for two seats on a flight. That doesn't just include fat people, even body builders have been penalised.
