The beginning of my wake up call that I had to quit myself was the night my 16 year old daughter got caught drunk by the police. It's true that kids get into trouble and do stupid things. We just made it clear that that was not OK and scaled back her freedom and it has been an incident free year since. Keep an eye on it. Because she got caught by authorities they suggested an assessment and they determined her to be "not there yet." Not saying you need to go that far if this is the only time he has done this but if you get concerned later it is an option.