Binge drinking is a risky behavior on many levels. 
According to Office of Juvenile Justice and Delinquency Prevention, about 90% of the alcohol consumed by youth under the age of 21 in the United States is in the form of binge drinks.
Excessive drinking both in the form of heavy drinking or binge drinking, is associated with numerous health problems, including—
  • Chronic diseases such as liver cirrhosis (damage to liver cells); pancreatitis (inflammation of the pancreas); various cancers, including liver, mouth, throat, larynx (the voice box), and esophagus; high blood pressure; and psychological disorders.
  • Unintentional injuries, such as motor-vehicle traffic crashes, falls, drowning, burns and firearm injuries.
  • Violence, such as child maltreatment, homicide, and suicide.
  •  Sudden infant death syndrome (SIDS).

  • Alcohol abuse or dependence.

  • Repeated episodes of binge drinking during adolescence may lead to long-lasting deficits in cognitive abilities, including learning and memory.

 
According to TN state law you can face criminal AND civil charges for providing alcohol to anyone under 21 years old.