^^^And if the cost of the 'violence interruptors' is outweighed by lesser readmission penalties on the hospital, it is a financial win for the hospital. This is why the hospitals are doing this on their own dime.
This is the same reason hospitals are sending home health nurses out to see the little old lady with CHF who was just discharged; to manage her care at home to prevent her from having to come back to the hospital. If she comes back within 30 days of discharge, the hospital gets a financial penalty. So, cheaper to send that nurse out to keep the little old lady out of the hospital.