Jennifer L. Pomeranz of Temple's Department of Public Health has written Extending the Fantasy in the Supermarket: Where Unhealthy Food Promotions Meet Children and How the Government Can Intervene, 12 Indiana Health Law Review 117 (2012). Here's the abstract:
This paper summarizes research concerning the extent of in-store marketing of foods to children and the effects of such marketing. It identifies several strategies that the federal and state or local governments might use to regulate in-store and package-based marketing and assesses the food industry's expected arguments against such regulations. The paper analyzes how courts would likely scrutinize the constitutionality of such regulations to identify which approaches are most likely to make a positive impact on public health and succeed if challenged in court.
True, children are marketed to as soon as they can ride in a cart. On the other hand, they have no money and everything leaving the store with them is purchased by their parents.
What’s wrong with that?