oh god.. this subject. i remember school pizza.. it was a slab of nasty ass dough with a table spoon of ketchup-like sauce and some low grade shredded cheese on it. far from a vegetable.
it's just easier and cheaper than figuring out how to get a REAL vegetable into a meal. i think this travesty can be alleviated some on the local level if the school system isn't in a completely poor area and the parents/PTA actually give a crap enough to do something about it.
imo, this targets the poorest systems, who can't afford to fix a better lunch at home... keeping them on the conveyor belt of obesity, ignorance and apathy.
my goddaughter was highly allergic to apples the first few years of her life. her mother had to fight to get a no-apple table in her school. i assumed other allergies were handled the same way, no-peanut-table, etc... peanut butter was a staple in school lunch when i was a kid