We get these misguided lads on site through labour agencies and the one thing they've lacked throughout their lives is any real resposibility and male direction/discipline. The foremen have noticed that once they're given a more dangerous task that involves dangerous machinery i.e an air hammer or angle grinder, and working in a team they become aware that they're responsible for someone else's safety/life. This sense of responsibility then leads too a sense of purpose, thus they feel more valued. The change in personality is soon visible because they start turning up on time and working in a proactive manner and come for a pint or two with people they probably wouldn't have socialized with before working on large construction/demolition sites. So what I'm trying to say is that hard work under predominatly male supervision often straightens them out along with encouragement and praise for a job well done and a fierce tongue lashing for laziness and stupidity. But I have little knowledge on the female 'youths' so it would be great to hear some feedback