You can tell people are just dying for news or controversy when they really dig for these things to make sense. Now I understand that the whole it could insult fat people, and make kids think that all these people do is eat all day like the fat princess.
Though it wont make anyone want to be fat, I mean how often do you want to mimic the uncool character? If anything youd want to be the protagonist...so thats pointless right away. Fat people are also already a social no-no in everything else, so im pretty sure kids will get enough counter messages against being fat/obese/overeating elsewhere. Think about it, is being fat ever portrayed as ok? not really...I mean the most common insults stem from weight for many people. I think thats wrong but im just saying what I see
So in the end, this is probably not going to make anyone fat and people are really digging deep to make this game mean something.