Geting a punsihment for breaking the rules is not unfair. It is a part of life in every society. You can beliefe me that the punishments you earn from your parents are easier to take as some you would earn as adult when ypur parents would fail to teach you this leasson.
Well some parents have to many rules and some are to strict with it. But the most rules parents give male sense and kids who grow up without rules and without punishments have a very difficult life as adult.