Should we ban chocolate milk from schools? Why or why not?

I would say no. Verses regular "white" (nonfat or skin) milk, it does not have significantly more calories (20 more) and encourages children to drink milk, as they would otherwise be drinking something like soda. Or water, water's not that bad. No protein though.

We should ban government intervention in schools. It is not a proper subject of political machinations.

When I was in grade school I complained to the cook because the vegetables were so greasy that I could not choke them down. She said federal law required her to use a certain amount of butter, and she thought children don't like vegetables, so she put it all there. The law required so much butter because the government had a lot to get rid of, because federal law set the price of milk at an hour's wage per gallon, and the federal government had to buy all the unsold milk to keep the price up. Nobody considered whether that was good or bad for a kid's diet. That is the sort of insanity that is brought on by political control of school lunches.