its illegal for a reason
Before you drink. Think.
Drinking while driving is an extreme thing, or drinking before you drive. If you are intoxicated, you are at a high risk of killing yourself and others around you by being on the road. If you are underage and drinking, that is another felony, you can get charged a lot for that and will be caught by anyone.
A teenager will consume more than expected, or what they wanted to, and some aren't accidental. Alcohol is somewhat a emotional pain reliever for some. They drink until there pain is "washed away" but don't realize it will come back, maybe even stronger. When they drink more and more, the amount of alcohol in there system is not suitable enough for them, there for causing alcohol poisoning.