I agree that there should be more done in the Yeshiva to make kids aware. However, as a parent, if you feel that your kids are not getting enough information about this, then do something about it.
1- Contact the Yeshivah (better if you get a group of parents) and say that you would like them to address the issue and offer to help them set it up.
2- Speak to your kids abour drugs. Get in the habit of having deep conversations and being able to talk about such heavy duty topics. Know who their friends are, what type of friends they are, where they hang out and know what type of things they do in their free time. (make your home a place where they feel welcome)
3- Speak to your Rav at shul and see if you can organize something more local. Speal to people at Mask or ohel or wny similar group and they might have someone who would be willing to speak.
All of us have responsibilities in this matter. However when we feel that the others are not doing their part, then it’s up to us to rise to the challenge.