Good point about random drug testing, you would have been positive; you may also have become mildly stoned, did you notice? Random drug testing isn't really a good idea for this reason. In this situation I would have been reassured knowing the youths were stoned, rather than drunk or even just being bolshy; I'd rather deal with a large group of stoned baseball capped youths than a group of baseball capped youths, drunk or not. I've never experienced a violent stoner.