So when a kid trying to be good is asked by his thug friend to go out, he goes and does whatever he can to fit in. Otherwise he will be called a pussy and get his ass beaten (or even killed) on a daily basis.
This is nature problem, not nurture. Good people choose right over wrong, regardless of personal cost. Blaming others, the family, community or system is merely a convenient, and unfortunately effective way of dealing with the ensuing personal guilt, which ultimately destroys the only natural corrective force available to combat the problem: ones sense of personal responsibility.