We all remember HS, you had a pretty damn good idea where there would be alcohol and could easily plan accordingly (read: not bring your car) to compensate and keep yourself and the people around you safe. Theres a way to drink responsibly at that age, and it's sad that some people just can grasp that. If you're going to drink, dont drive. Taxi cabs, walking... I know I called my parents telling them I wouldnt be able to make it home because I was drinking.
Theres a lot of people to blame for this, this girl should wait until shes 21 to be free again.