My thoughts are, scientific data supports typically lower weight being healthier for some reasons but not for all reasons or in all cases, it's not a guarantee of health but it can serve as a rough marker, good nutrition and regular exercise should be encouraged and supported across the board, shaming is terrible and should be banned. Studies show shaming is equivocal at best for motivating and outright harmful far, far more often, with the added health issues of eating disorders, anxiety disorders and suicide accompanying shaming. On the other hand, binge eating itself may be a sign of escapism or a coping mechanism, a symptom of another illness which should be treated carefully -- I'm probably not alone in having ballooned in weight while being terribly depressed because fuck it, another bag of chips and a sitcom on rerun is the only pleasure my goddamn brain is getting. But you don't attack the person for being fat, it's a delicate situation. Trigger warning, something around a third of people who qualify as medically obese were found to be sexually assaulted.

And insofar as it goes, around here if people are binge drinking or doing drugs to unhealthy levels it's rare we get moralizing about "what they're doing to their body." Even if it's harmful, question your own motivation in how you approach and the information being presented. More understanding, more positive support, less judgment, full communism