I think a lot of them snack the whole day and don't count any of that indeed.  We had one of them at work though who honestly wouldn't eat the whole time. It was almost like intermittent fasting. But even that won't help if they somehow manage to eat for two in the hours outside of work (it's car was covered in fastfood bags and boxes). And it was complaining the whole time. I don't get why it did that, maybe it "starved" itself for a few hours for some extra points in the self pitying Olympics.