I would say as a coach if I knew one of my athletes was using steroids, I would first have a conversation with him and his parents about how it's not permitted, not healthy, etc.. etc.. and if there is continued use, dismissal from the team would be next. I do know some doctors prescribe HGH to kids to help grow, so in that situation, what can you do? It becomes an ethical issue, if coaches permit illegal use, they have to live with their decisions. There are a lot of situations in athletics that a moral compass should be able to guide us but a lot of parents, coaches, athletes, etc.. put winning above all else and that's not a good thing in the long run.