Although views on the ideal drug policy vary from person to person, one perspective should be close to universal. Namely that regardless of whether drugs should be used recreationally or not, they're definitely not intended for children.
Not only do many drugs have risks for addiction and potentially life-threatening effects that even adults can struggle with, but they've been found to have adverse effects on brain development in adolescents.
Although it's hard to tell whether or not the Massachusetts man featured in this story agrees that such drugs have no place around children, there's still a clear reason why he's responsible for the situation.