I'm seriously concerned by some of the comments on here.
Claims that cannabis is highly addictive and wrecks peoples lives are too broad brush simplified. I'd guess that a lot of us are parents, and one day we will need to have drug conversations with our kids, so telling them weed will wreck your life and is highly addictive will embarrass you and make your kids think you must be dumber than you look...
Honestly, do some reading about this, on drug addiction / the war on drugs / cannabis use. Quite clearly, prohibition is not working, never has, never will. Quite clearly, cannabis is less harmful than alcohol or tobacco.
Our kids know this, they see this frequently, they haven't seen anyones live get wrecked for ever, or see people crawling the walls with addiction cravings. The instant knee jerk that we've all been told for most of our lives, all drugs are bad! is crap peddled by the war on drug front, who are merely protecting their industry and income.
One can find extracts from Chasing The Scream online, or even buy the book online, and maybe learn something instead of simply going for the knee jerk.