Clearly, he's found a substitute drug -- Pathway.
I've heard of people like this. Most grow out of it in the normal course. What this guy doesn't realise is the vast majority of people who use marijuana suffer no ill effects. But children should not be tasting the forbidden fruit until they are old enough -- whether it is sex, drugs or even cigarettes. I wouldn't dream of giving a 14 year old alcohol, cigarettes, pot, sex, or a car to drive, at least without adult supervision. They all require a degree of maturity to handle them. But, if I found my 14 year old smoking cigarettes, I would be more concerned than if I found her experimenting with marijuana. The key is that cigarettes really are much more harmful. Marijuana may bring about a change or modification in consciousness -- it can heighten appreciation of music and art for example. What I would do, as a parent would be to ensure that the child was aware of the dangers (mostly of getting caught ) and try to persuade the child, just as with alcohol,that there's a time and a place for everything, and going to school stoned is not appropriate. The "Aristotelian Mean" ---moderation in all things--- would be my motto. It's not the USE of marijuana or alcohol that is a problem it is the ABUSE. And US drug warriors, because of their puritanical blinkers, think that all use is abuse. As such, that is where their use of ideology, lies and misrepresentation of the reality of drugs becomes ABUSE of the American population and an abuse of the power that they hold in society.
That's why the drug war fails -- because the powers that be are addicted to POWER and THAT is an ABUSE.