i may to sound condoning for drugs here, but please hear me out, he's 20 still basically a kid, but really has all the legal requirements/privilege as an adult, not an easy place to be in.
Cannabis is not an extremely serious drug, but overdoing it and mixing with alcohol does make it alot worse,almost to a level unlike cannabis itself. I been through it myself, I had roughened up against my parents all that while was like they dont understand me , dont understand 'my life', in a way they did only as far as 'the "NORMAL" order of conforming the society with socially-defined 'age-appropriated responsibility-expectations'.
please bear with me but um,
i think indeed, on the surface it Looks you ARE doing the 'right thing', but it also backfires badly on your relationships. So I dare to say, dont flush it, just walk to him, say 'look i understand you are young, you have freinds doing party times and you want to have fun while you are young' so 'here give it back' and say like, i believe this is yours, i expect you know all the hazards that go with it, obviously the law, police, and your brain's clarity and your overall body health. Do you realise it takes 60 days for your ability to recall think clearly to come back? im sure you do, so its your life, use it wisely. But please try not to keep it in your room....
*outside this I dont know your state laws regarding how much cannabis seized woould land you in jail, or what fines and ultimately find out if he get busted , are you also subjected to the law? since its your house/flat?
then saying lets have coffee, i want to talk something else different...
say something, we worry about you, but we know we cant control how you do in life. You are older enough to make decisions, but id you're stuck for advice, you can always ask me.
What id like to say is, saying something like, i hope you realise that one day you will wake up and say 'shit im 30 now' time to man up, get serious....but then you might say, im still not too old, i can still enjoy a few hooch or beer and get by....but then it becomes REAL HARD to get out of that rut just to get a job, or a reputation to get and keep a job...society have a low tolerance for alternative lifestyle, other than 'lifestyle appearances' like cars, and houses which amounts to nothing but conformity'. that i understand you feel trapped , we all do.... etc
back to me,,, well you figure out something else to say im only giving ideas on 'laying it on the table , basically saying you ought you know what I am at, and i know where you are at, this is your responsibility, please dont make it mine...but beware i cant help you if you wreck your own reputation that makes your life difficult...so for that only you can do that.
back to me again ,...it doesnt sound like cannabis, or even if it were, it'd be laced with pcp, and it sounded he's be exeperimenting with meth...especially with all the rage...
other than what i said... (as a way of getting an oppurtunity to get him to listen (while returning the found dope)...i KNOW this sounds outrageous for me to tell you to return the (small amount?) pot...but the idea behind my 'idea' is that, since you returning this to him (probably too late now) he'd see you as a freind rather than as a menacing step-father...and woudl go away , in time he'd stop and think why you gave it back to him and think what you said.....kind of like he'd take it in.....may not happen now or next week, maybe 6 months maybe 2 years or even 5 years down the track. but like once he did, and (reflected on that moment you gave it back to him( (My mum once gave me back the cannabis oil capsule i smoked it lovely- but i can see --its hard to explain--...i was getting ripped off buying drugs, so mum doesn want to steal it from me--also that she showed she knows i will stop sometime, it was a phase in my life.
and it was.
i havent bought or grew pot for 12 years, but only had 4 or 5 tokes in all that time since with old freindsm but yah im not hooked on it and never wish to be.
(i was psychologically hooked badly)
but yeah its like me way of babbling a radical idea is that to show him you do have hope for him and to show you're not against him, and maybe you'd might like to say, we need need space maybe you want to move out with freinds? but if you do (you talking to your stepson) please look after yourself, dont rub it up with the cops, and keep cool but you'd need to get serious about work and life at some stage , only you can figure this out, not me, you're on your own...
kind of like that?
just my 2 cents...( i hope i havent brassed you off, only trying to show another way of dealing with drugs and young adults, even if its contrary to the popular opinion...)
cheers