Some of the best lunches I had in Catholic School were the rare times I forgot mine, and couldn’t get a hold of my folks, to bail me out. No PBJ, baloney, or egg salad that day, and the only time I got a Twinkie, or some other unhealthy, but tasty snack ;)
By the time they got to junior high, it was all sack lunches. My daughter's junior high was built in 1947 and had questions about the water quality in the old pipes, so they were also expected to bring potable water from home. Oh, the inhumanity!