Are subcultures a sign of revolt or an expression of style?

To an extent sub-cultures are a sign of revolt, often they are revolting against parents or social situations that the youths that belong o them want to be different from. At the same time they express the style the individual wants to be associated with, this expression of style is also in a way an expression of revolt. For example punks like to associate themselves with shocking imagery such as Nazi symbols and Hitler pictures, not due to any association to being a Nazi but to be associated with a particular style which in turn expresses a form of revolt. This revolt is not a particularly political one it is just more a way to express freedom from parents and situations which the individuals are nevertheless tied to. The music involved in these sub-cultures is a further expression of this style and therefore revolt.