They concluded that advertising contributes to the "epidemic" of childhood obesity. To solve the problem, they recommended that food companies stop advertising to kids.
Since the food industry is regulated by these agencies, ignoring the recommendations would be like ignoring your boss when he "recommends" that you do something.
But the ban is okay, says the government, because it promotes "public health."
There are some public health problems that the government should address: smallpox epidemics, for example.
Obesity is different. It is not a public health problem, it's a private one. And government regulations that seek to "make us healthier" infringe on personal liberty.
Give me a break and let me eat what I want.