Fatties gonna fat. If they were the sort of people to take responsibility for their actions, they wouldn't be obeasts.
I am sorely tempted to respond with a concise "Fuck. You." However, that is not conducive to understanding or correction. Also, I'm sure gimp didn't mean this as a personal affront and I perhaps knee jerked a bit. I admit I'm a bit testy here lately since weight loss is front and center in my mind right now, but I've decided to speak my peace here all the same.
Weight loss is not a simple matter of knowing calories out must be greater than calories in. Conceptually, it's simple, but that doesn't mean it's easy.
One of the factors that makes weight loss so hard is long is that for many of us, the weight packs on during a time of our lives when we are fundamentally unhappy people, suffering from anxiety, depression, and other issues.
While I'm not suggesting we view depression, for example, as an excuse for bad behavior, we should consider that these type of menthal health problems can be brought on or intensified by external occurrences.
Therefore it is asinine to say all overweight people are simply irresponsible and act like that is all there is to it, such an interpretation is positively sociopathic.
Rather it is better to say people who suffer from obesity are irresponsible because they do not prioritize their health, instead putting issues like depression, poor self concept, etc. as their focus.
The problem is, "fatties" have got to muster a considerable amount more of willpower to realize they truly are better than not only their weight problem, but also the synthesis of their weight problem and all those contributing factors. To overcome those exacerbating issues is simply far more difficult than is commonly understood or perceived.
And quite frankly unfounded negative comments about their personal character do not contribute to such a momentous epiphany of self-worth. They do not need to be told how terrible they are, they need to be told they are better than what they currently do to themselves.
They need to be told to forgive themselves and let the past go, and that life is worth living and it's possible to be healthy if you want it more than you want cake, comfort food, sugar, etc. You can't make them believe it, but it doesn't hurt to hear it all the same.
Telling them they're stupid, irresponsible, bad, or whatever you want to call it accomplishes nothing. Just getting a person to the state where they realize their life is worth more than the comfort they get from their bad eating habits is in and of itself a monumental effort, and every jab, nasty comment and hurtful thing someone says about them on the way pushes them a little further away from realizing this.
"Fatties" are not terrible people of poor character who are fat because they're bad. Fatties are normal people who lost their way, perhaps lost hope, forgot that they were important, or got their priorities mixed up or all of the above, who now have a behavior problem that is not trivial to solve. Studies have shown it takes, on average, 12 serious attempts to lose weight before a dieter achieves success.
Shaming will not solve someone's weight problem. It just makes them feel worse about themselves, and they retreat into their coping mechanisms, which makes them even fatter and subject to more ridicule and it just continues.
You don't have to and shouldn't condone poor choices made by others. However, such a comment is, if anything, only further shaming people who need to work through their difficult personal problems into continuing their poor behavior. If you see a man teetering on the edge of a pit, you have no responsibility to drag him to safety, however you damn well better not shove him in either.