When I was 17, I had a drug buddy kicked out of his house and dropped on my doorstep. Needless to say, we broke into his house and stole alcohol from his parents every night. They had 20+ bottles and bought new ones every couple of days so they didnt notice. He was bothered by getting kicked out, but we got drunk and hung out for two weeks.
It may help your son, but you need to prepare for more action and really try to plan for helping him.