I was going to add to your comment that all prisons have abstinence cultures that are oriented around the twelve-step movement. They're already there. Again, what is important is thinking of where the alternatives are we can build on and tap into.
Just to support your question, I think they deserve a lot of respect. We need to think of ways of seeing it as a base that can draw people together, and certainly respect spirituality as a very important aspect of recovery.