Kids should not smoke cigarettes.
Bob has two pre-teenage children, a boy and a girl.
Bob wants his children to learn to assume responsibility for their actions and make their own decisions.
Bob presents clear evidence about the dangers of smoking when he catches his son smoking cigarettes.
Bob says nothing when he catches his son smoking cigarettes.
Bob's son examines the evidence and agrees that smoking is not smart and decides to quit.
Bob's son continues to smoke and admits it's his own fault when he suffers lung damage.