My son regularly buys sweets from several of his classmates who bring them in to school to sell at a profit. There is a thriving undercover trade (st least they are not selling drugs).
My son tells me some of the parents supply their children with wholesale boxes of sweets to trade with. Other children use their pocket money to buy large bags of sweets, then divide them up to sell. Parents apparently turn a blind eye to their teenager's little business.
Teachers see this trading going on every break time but rarely intervene. AFAIK the PTA is doing nothing either (I have seen no letters or petitions etc).
The school (a grammar school fwiw) has no sweet or fizzy drink machines, and encourages healthy eating at lunchtime (salad bar, fresh fruit, milk bar etc and chips only served twice a week).
I am far from wringing my hands in anguish while throwing them up in horror at this lax attitude to undercover sweet trading, but but even so....