That is a ridiculous statement and totally irrelevant to the disussion at hand. Selling pornography and drugs to children is already illegal in all 50 states. Soda pop and chips are legal products.
I'll make your argument for you in a less hysterical manner.
I think public schools should get out of the lunch and snack business and get back into the business of educating our children. If it were up to me, there would be no food or drinks of any kind served in school. Students can "brown bag" their lunches from home. That way, the parents can pack their own lunches for their own kids and the schools can just worry about the academic cirriculum. Trestle tables can be set up in the gymnasium or some other suitable place where the kids can get a half hour or so to quickly consume their bag lunches and then get back to their lessons.
This is really the best way. No more controversy over junk food being served to kids. No more silliness over kids being allergic to peanut butter. If your kid is allergic to peanut butter, make him a cheese sandwich instead or something.