Should women who don't care if they are fat be ”fat shamed” by anyone?

(disclaimer) This question may offend some maybe many, it deals with physical appearance and apparent beauty, those who do not care for such questions you have the opportunity to click away now…

Reading on the Internet I came across this article and I wonder how can women who know they are fat, and do not do anything considerable to reduce their mass be offended or become indignant because someone points out they are fat without actually calling them fat. If someone is fat and comfortable with themselves why not ignore the comments and go about doing what they do? Maybe they know they are fat but don’t want to be reminded of it so they can be in denial?