The problem with obesity is not, and never will be, based at school, most schools already provide a moderately healthy supply of food, with, of course, some gunk included, but they're kids ffs!
Letting parents spy on the kids won't help, all that does is increase the 'Big Brother' situation. And yes, the 'They drink it down like a coke' shows exactly what the problem is. Because everyone drinks coke, it can't be bad for you, can it? Remember, our local Coke factory not only sells the stuff, but uses it for cleaning the engines on the delivery vans, and a very good job it does too!