There are all sorts of reasons which might explain why you're so heavy but the mechanics are very simple. You're eating too much and not exercising enough. You're storing the excess as fat. End of story.
It's been my experience that no one likes being singled out for doing something wrong. I certainly don't. It's difficult enough to do this with loved ones because the person doing the calling out may not want to hurt the other person's feelings. This seems to be less the case with parents though. My parents, had no problem telling me what I was doing wrong and how I needed to fix it. But in the world outside of familial relations no one expects to hear criticism, implied or not, from someone they're doing business with and/or don't know from Adam. So recently, three women in California, who look to be somewhat larger than a healthy norm, were offended when they received a bill that said "fat girls".
At the time of this writing it appears that Jeff has been suspended. If you are in the business of serving the public then one of the top rules to live by is not to upset the customer. So to that extent Jeff, if indeed he did enter the words "fat girls" on the receipt, was wrong. I'm not sure it's an offense for which he should be fired but it's not my business. It's not Jeff's job to point out to these women that they are fat. I'm betting they know that every time they look in a mirror or go shopping for clothing. Mirrors don't lie. Does Jeff do that to every fat person that comes in to order some food or just the ones that he feels are not really a risk to kick his a$$? Cause fat or not some large people can throw down and aren't the type of people you want to needlessly enrage.
It is however the women's doctor's job to point out to them that they are apparently WAY past a healthy weight range and are increasing their risks for the types of conditions I mentioned before. And if we accept the premises underlying the PPACA (Obamacare) or from
Unfortunately obesity is very tied up with ideas around beauty, desirability and discrimination. But that doesn't change the fact that rude servers or waiters aside, human beings are not designed to be so heavy. It's ultimately a medical issue and one that we as Americans in particular, need to deal with head on. I don't like rude people and would not have done what Jeff allegedly did. But I also think obesity is a real problem. And we do no favors to anyone by trying to be "fat-positive" or ignoring the fact that Americans are getting fatter and fatter every year.