I totally understand what people go through when they have too much to drink. Even though they are wrecked the next day one led to another and, well I know where it is coming from.
You got a buzz on, maybe even a heavy one, but you're still getting the job done, passing as a responsible adult. There's no hint of the nausea or sweats you get right before you puke, but then out of nowhere, there's just that little spasm in the belly and the next thing you know you're sick.
Alcoholism is no joke.
I don't think it's necessarily that boxed wine is bad.
Lots of underage kids get plastered because their lack of experience means they have no idea how to pace themselves or what the effects are really going to be, on top of having a general very low tolerance for alcohol.