Our daughters had it drummed into them that the effects of too much alcohol can be devastating and they knew what would happen if they ever came home drunk, ( we would only have grounded them, but it was never revealed, they say now that they thought that we would put them into care!) our GD won’t go anywhere near alcohol and our GS is the same, they have very high principals ( strong Vegetarian ethics, want to save the planet etc.) and are often the butt of jokes from their peers. They have also been brought up to know the effects of alcohol not only on your inhibitions but on your life.
Ironic really there we were telling our children ( much to their horror) in front of their friends about the perils of drink and my DB was ( unknown to us) an alcoholic, the GCs were in their early teens when he died from Alcoholic poisoning, so that really hit home.
It has to be education at home and in the schools, show graphic pictures, show videos of victims of alcohol, don’t tiptoe around the subject. If the parents won’t do it then the schools must.