I do think you're being a bit overly cynical. Many kids will find a way to liquidate their money and buy cannabis. I know this, because that's what I would have

I do think you're being a bit overly cynical. Many kids will find a way to liquidate their money and buy cannabis. I know this, because that's what I would have done. However, unlike software engineering, policy shouldn't be made to cover all the corner cases.