A Mohawk may, in certain family circumstances, reflect parental values. So be it. However, concerning the question to which you refer, it clearly did not. It would have reflected a contrary, even rebellious, attitude toward those values. That is precisely why the parents were seeking my advice.
Parents should not say yes to rebellious things, even if the child in question is not and never has been rebellious. I have heard too many parents say, with great regret, that shortly after giving a non-rebellious child permission to acquire some rebellious symbol (t-shirt emblazoned with a disrespectful message, sexually provocative clothing, peculiar haircut, abnormal hair coloring, punk or goth clothing, tattoo, body piercing, earlobe thingamajig) things began going rapidly downhill. Right. The rebellious symbol attracts the attention of rebellious kids who encourage other rebellious behavior on the part of the previously non-rebellious kid who begins to want the approval of the rebellious kids which he can only obtain by beginning to act in increasingly rebellious ways and pretty soon everyone is shaking their heads and asking what in the world happened.