The answer is: minimal deterrence will make a child more likely to internalize the idea that he or she doesn't want to engage in the undesired behavior.
Minimal deterrence phenomenon refers to a situation when people choose to avoid a certain type of behavior by taking all the justification from doing that behavior.
Example of this would be teaching a child to focus on winning to compete in a athletic competition to stop eating unhealthy.
When children desire to win an athletic competition, they would perceive smoking as an act that will prevent them from getting what they desire. (their justification to eat unhealthy would be reduced)