Consequences also come with drinking underage: 

-failing grades in school

-lack of participation in activities 

-hangovers & illness 

-unwanted, unplanned, & unprotected sexual activity

-assault

-alcohol-related vehicle crashes

-change in brain development

-alcohol poisoning 

This article discusses the drinking levels among youth in the United States. Read more about the statistics of youth drinking in the past 30 days. https://www.cdc.gov/alcohol/fact-sheets/underage-drinking.htm