> most of them aren't rapists, murderers, and child molesters.

I assume there are also a lot of people in prison that aren't rapists or murderers but still cause a lot of troubles if left to their own device. What should be done with these ones? I agree prison is cruel and inhuman and I'm all for better detention conditions, but I don't think it's realistic to suggest we should leave these people walk freely (or to suggest that they don't exist). What are the alternatives?