Drugs are everywhere, TBF they were 25 years ago too.
I think it does sway teens and young adults due to seeing so many peers use them, it's very easy to see it as A okay.
I've talked as openly as possible about drugs to my teens. (never admitting to them, that I used drug at their age) I tried to use examples of what happened to friends, having bad nights, and some of the longer term effects on some of my friends.
and basically made them aware that every time they use a drug it's a lottery as how it will effect you, whether its a bad episode, addiction, long term MH issues, strength of weed, not knowing what you are actually buying, mixing some drugs and alcohol.
Also giving advice on if they were to try drugs, to make sure they are with people they absolutely trust.
My eldest from around year 9 knew where to get drugs at school, and who was using drugs. There was a tiny % if his acquaintances who did, most of his friends where not interested.
years later the couple of his friends who started smoking weed around year 9 and ten. Are starting already starting to waste there life, and are in to harder drugs then weed. DS can see for himself how the drugs have and are affecting them. (other friends who came to drugs later seem fine and moderate the use)
I suspect he's smoked weed but nothing more.
He's not into alcohol either, will have few very occasionally, but doesn't like being wasted.
I worried last year when he went away with a group of friends he knew through an activity, they were all older than him, late teens early 20s.
He had an amazing time, But due to the nature of the activity they do, taking drugs would impair them, So no one even had weed.
all I can do as a parent is guide them and give them advice. As a pp there is not much you can do once they are independent.
Be open though, and if you don't know anything about drugs and the happy and bad effects of them. Find out and talk about the good the bad and the ugly effects. it gives them info to make better choices in different environments, and not relying on a couple of friends who do it and say how amazing it is and they have no ill effects.