a safe prison

I got in a debate with one of my friends about how to make prisons safer. and i think that if you lax things and allowed the prison inmates to have some luxuries like a poster or other things that would be considered “contraband” in hopes to make things more relaxed and peaceful. also i brought up the thought of giving out a regiment of marijuana as a medical relaxer. his is basically the exact opposite idea to mine. so is his idea better or is my idea better and if you have an idea of your own feel free to voice it.