I have also seen what happens when a 15-year-old girl (my youngest daughter) drinks alcohol without constant supervision.
She was attending a 21st at a hotel, so yes I knew there would be alcohol, but also knew she wouldn't be served and that the adults there (whom I knew) would watch her. Stupid mistake. I forgot how cunning teens can be.
Within an hour of arriving she had drunk a carafe of still wine. She was a mess.
Someone phoned me and I went to get her. She had to be carried to the car, had been sick all over herself and could barely talk. I wasn't angry, I was scared.
A cold shower didn't help much and after tying her hair in a ponytail I put her to bed in the recovery position and sat with her until the small hours of the morning, when she finally stopped being sick and was sleeping soundly.
I was a heartbeat away from calling an ambulance. So Mr Large, you have my support. There's plenty of time to drink, and not enough time to be young and carefree.