“Does this sort of thing happen?:
Yes, although our communal leadership is either in massive denial, or in massive cover up mode. (Nothing worse for a yeshiva’s reputation than to have a drug bust.)
“I think it’s critical that we create a yeshiva with beis midrash for buchorim who are recovering drug addicts post rehab so they can get extra therapy while still being in a yeshiva. What do you think?”
Not only that, but a huge amount of Torah directly supports the 12 step recovery philosophy. Last Shabat I led an aggadata shiur on the narrative of Rabbi Shimon and the cave, pointing out the recovery lessons there, to a class of recovering addicts and their families. I would love to support such a yeshiva and if you can get anyone interested, please have them contact me so that I can lend my support publicly. (I’m easy to find as I use only my real name in my internet comments and don’t hide where I work and in what community I live.)