You only have a limited grasp of what back pack movement is by trying to box it into 1thing like that.
Either way, you extra failed for trying to separate graffiti culture and hip hop in the first place.
Graf and hip hop have been together since the genesis. So saying back pack is graffiti hip hop, is just stupid. All hip hop is graffiti hip hop.
like i already said back pack lyrics and content is about is varied as it can be (in the past)
i mean like people like talib and mos were more self aware than say mystikal or juvenile
back pack is just postmodernism in hip hop
sometimes ironic and self referential, and occasionally absurd (MF DOOM)
and to qoute websters:
thisviddeo, even though i thought it was pompous, is a great example of the emergence of postmodern thinkning in hip hopof, relating to, or being any of various movements in reaction to modernism that are typically characterized by a return to traditional materials and forms