Holding parents accountable for their children's actions is becoming increasingly out-of-date. Unfortunately, we hold parents accountable for good and sufficient reasons, and those reasons aren't disappearing, it's just that teenagers are becoming capable of committing larger and larger crimes that the parents can be completely unaware of. For instance, collecting illegal MP3s can give a fine or a jail term, and it's going to be very easy in 10 years to completely hide them from your parents (after mass storage devices are so big that the odd gigabytes eaten here or there arouses no suspicion). Can we hold parents accountable for this?