A few years ago I went to a MASK symposium on “Teens at Risk”. I a man who recently lost his son spoke. Many rabbaim spoke. Among many things said that night, they educated the parents what to look for.
I think the yeshivas should talk to the kids about the danger of all substance abuse, but if they insist on having their heads in the sand, at least they should educate the parents.
I don’t really think any thing will happen though. Most yeshivas are still too busy saying it doesn’t happen in THEIR yeshiva and worrying that it might be bitul Torah or the parents might take kids out if they don’t learn more that the yeshiva down the block.