I do think it's understandable (though not necessarily justifiable) when they get that first rush of testosterone at the same time as their first few beers in their late teens. If he's still doing it at 25+ then I would start to worry and if he's still doing it at 30+ then unfortunately you've...
Everyone has run ins with their teenage kids (and I was that age in 1979 and did dreadful things, far worse I suspect than your son :blush:)
He'll make you proud yet (but maybe not in the next 2 years :wink:)