Since recruitment quotas weren't being met for sometime, we again have many convicted felons in our armed forces.
However, part of me thinks a few years in the the military might do a person who was going to go to prison some good, stripping them of their old personality and, if nothing else, teaching them discipline and a sense of social duty.
A friend of mine was in military school for a bit because his parents are silly. Him and his "unit" did this at the graduation ceremony. They were 12, and it went over very well.