Blame is often frustration.
I never ran with the crowd. I wasn't allowed to. I did get the 'drugs' discussion B4 I began College

....... but I wasn't going to do things simply because others did.
Friendships are so important from about the age of 9, when children become more aware. At a time when they are aware that they will move 'up' and hopefully friends will go 'up' too - so being in the crowd is a kind of safety. By mid-30s I was aware that friendships don't last or they change or people move away ....... but at age 9+ being told that wouldn't have made much difference. Even though I had friends in the different hobbies who didn't cross over to visiting at home ....... I lived in the moment usually and never though ahead.
Most people think that if they experiment that they can 'get off' or 'stop smoking' but sadly, find out that isn't always the case. My sister was the same with ciggies ........ always said that she could stop when she wanted then would be caught ........ alcohol the same. Fortunately my anxiety didn't take me that way.
I am aware that in the Midlands many Schools have sniffer dogs attending several times a day, at the Gates or inside the premises. It is said that the local burger van traded things as well as burgers, it stood a few yards from the secondary school. It had a Licence so couldn't be moved on ...... apparently. A lad was stabbed not far from this van about 5 years ago ........... of course, talk was that it was drug related

I suppose the message is, why do what others want you to do? and if you don't feel comfortable about a situation, tell friends that you will wait a few days. That way the young person can watch what happens to others in relation to their actions.
One can't avoid sounding like one is a) nagging and b) of course, adults don't know much do they
