No it is not. For the same reason you don't shoot shoplifters.
Speak for yourself. I don't even work in a store, I just shoot shoplifters. Fun fact, 90% of shoplifters are babies.
Obesity does have strong correlations to health problem, but your insensitive stereotypes are rude and unfounded. Making such demeaning caricatures out of heavier individuals is simply not helping the issues. Yes, many people would reap many health benefits from losing weight, but almost as many underweight people would reap similar benefits from gaining weight.
It is always important to remember that the #1 health risk to the obese is not heart problems or diabetes, it is misdiagnosis. So many people and even doctor assume that if you're heavy, all your health problems are caused by that, and so they often miss obvious symptoms of other real, life threatening conditions. It is also important to remember that an unstable weight correlates to health problems even more strongly than obesity. Many heavier individuals are pressured by peers and doctors to lose weight, and they often attempt to do so with unhealthy means, such as various eating disorders. This often leads to fluctuating weight and other problems. If you have to choose between fluctuating weight and obesity, obesity is statistically much safer.
Not to beat a dead horse, but another thing to keep in mind is that correlation is not causation. Many instances in the statistics of obesity can be shown to involve the correlation of "I am sick, and it is making me heavy". When these cases are weeded out, the correlations become much weaker, and it becomes even more obvious that the underweight or inactive are at just as much risk as the obese.
In conclusion, you can decide, if you wish, that obesity is not a responsible way to live. I would accuse you of insensitivity but nothing more. But ridiculing and stereotyping the obese as moronic imbeciles that are out of control and grossly irresponsible is crossing the line. I wouldn't call you quite as bad as a racist, but you would be quickly approaching it. The fact of the matter is that very few of the people who are obese would live up to any of those demeaning stereotypes, and probably just as many (per capita) "normal" individuals would live up to them if you simply looked. But you aren't looking, because you are singling out the obese and deciding to throw your vile at them, when they simply don't deserve it anymore than anyone else.
He has not acquired a fortune; the fortune has acquired him. -- Bion