There is nothing new about our love of fat and sugar. We have a strong evolutionary drive to eat these foods because they are rich sources of calories which can be laid down as fat - which is simply stored energy. Our ancestors needed plenty of fat to fuel activity during periods of food scarcity and to pay for our large, expensive brains.
Exercise more, eat (and drink) fewer calories. It's a simple message, but hard to do. In fact, the more we learn about obesity, the more we realise how complex the problem is and why hammering home this message on its own doesn't get you very far, if you're trying to help people lose weight or prevent them becoming overweight in the first place.
We give companies the ability to advertise harmful foods to children in a misleading way. We make healthier food more expensive and harder to come by. We create living environments not conducive to active lives. We then chastise the obese for not exercising their personal choice as if they made that choice in a vacuum.
Let me tell you, HeiaHeia is the answer to all of us who lack the will power to get a grip of ourselves to start moving that body. HeiaHeia is some sort of fitness Facebook in which we can keep track of and share everything sporty we do.