In other words, the ball is in your court, and if you do not act now, the problem will likely grow worse. Of course, local school administrators can put commercial propaganda in their schools if they wish. That's for them to decide. School administrators shouldn't be allowed to have it both ways. They shouldn't be able to take federal money for school lunches, and then take money or products from corporations to subvert the purposes of the lunch program.
Actions have consequences, and that applies as much to school administrators as to anyone else.
Federal taxpayers deserve better, and so do the nation's youth.