Ask him what he wants out of life.Which is why I need your advice Zakk or indeed anyones!
I like this as a strategy. He's almost an adult, and needs to start making adult choices. It's going to be difficult for him to accept that, but that's the challenge facing him. The pot issue is really secondary; the key thing would be for him to start making choices, rather than going with what feels good transiently.
Hell, what till yuo get this gem a couple times (as I have over the years): "Well you're criminal background check is spotless, so we're not going to be comfortable hiring you"
The logic goes, as it was told to me the last time I ran up on this, is that if you haven't so much as a parking ticket then that just means you're better at getting away with shit and they might not catch you if you want to rob the company blind.![]()
Are you fucking serious?![]()
Yep. Apparently not having a record just means you're talented crook.
Awesome.

Haven't come across this gem myself yet in the UK; will ask some HR friends to check to see if this bit of nonsense has crossed the pond yet...