Everybody has a role to play. But it makes it hard when the parents/guardians know what their children are doing and do not try to stop them, it makes it hard on others. First the parents/guardians must be willing to face reality and then others can help.
Now when it comes to teenagers living with their parents/guardians it is one thing but then it is another when you have grown children and know what they are doing and some are enjoying the benefits. You are setting your children up for failure/suicide instead of giving them the ultimatum that you are going to tell on them because you love them. Obviously some parents/guardians don’t love their children until a tragedy arise because if you did you would get your life right along with your children.
Now some of us do the best that we can as parents/guardians and our children make some bad choices but that ain’t our fault.