If one has a condition not to drink because the last time they drank, they joy rided a car and crashed it into a ditch, than its pretty clear that if they drink on probation they are not taking there offense seriously. So yes, PTRPs should go back to jail. If they didn't go back to jail, what other consequences can P.O.s use when someone violates probation? With no consequence then they will just continue to keep violating, no progress.