Well, parents have never been able to control what their children does after all they are independent beings with their own desires and needs, but you can direct them and monitor them so they dont get in trouble.
No, if the child is really a good person, I think he will consider his parents guidance for him, and the learning that the parents will gave him. I think parents can supervise their children as long as you know how to love and care with them, I am pretty sure that they will do what parents wanted for them. I know not ALL but some of it. Right?