How can a family prevent juvenile delinquency?

proper discipline, punishment for rule breaking: what ever seems to work for your child whether its time outs, groundings, total supervision (watching them sleep, eat, standing out side the bathroom) or a good 'ole fashioned butt beatin' (not child abuse if done with love and in the proper way my parents managed to beat the ADHD out of me and i thank them everyday), when they act like mature adults treat them like mature adults, when they act like irresponsible children treat them like irresponsible children, they act like morons treat them like morons, etc., etc., start young and don't be afraid to assert your self, don't be a tyrant they will rebel, don't be timid they will run all over you, start young, don't reward good behavior they won't get a reward in life, do reward your child when they go the extra mile tho