You left them home alone with the temptation of beer in the fridge. This one's on you, Dueller. Be thankful the house is intact and no one was hurt. Do have a talk with them about friends drinking and driving. Beyond that, just let them know you're not happy with their behavior, as they didn't show they are trustworthy. They will at least think twice before doing this again.
Looks like Steve beat me to these points!
