lol...that's actually kinda funny..in a way if you think about it...usually it's the kids stealing their parents stash when they first start...but not this time. i'd call them out on it. and i'd demand replacement (in either equal money or weed) and demand it stop. there shouldn't be stealing.....if i were you i'd call them out like this: (of course i'm trying to keep it respectful, because being disrespectful is a last turn)
"look, i know yal have been stealing my weed and it is going to stop. i work hard for what i have, and i don't appreciate being stolen from, and it's not just cuz it's weed (or drugs your choice of wording) it's the fact you're stealing. i want it replaced, and i want it to stop. if you guys really need a high that bad, ask me and i'll smoke with yal, but dont' go behind my back stealing my stuff." something along those lines