Prison Social Behaviour

last night I went to prison,I was with a group of students that were performing research on the best ways of making prisoners behave while in prison, sometimes the prisoners can be rude to the people serving the food, so the students placed buzzers on the food trays so if a prisoner acts rude to the person serving they get a small electrical discharge . . . I was surprised to see this was going on, most of the prisoners there were being held on small charges and most were foreigners, inmigrants or children of inmigrants, my thought was just send them back to their countries and that will make them think twice before commiting a petty crime, but no they wanted to pavlov train them...