I read one of reviews for this movie, written by phillip, in which he questions the worth of the roles played by Schiffer and that "comedian" that shall remain nameless.
I thank phillip for his questions because they forced me to produce answers I may have not examined more closely.
As fragmented and choppy as those story lines were, their existence is more real and true than the rest of the movie. As unnecessary and non-sensical the actions of Schiffer and the detective were, they exemplify how disposable the lives of these folks are to the privileged outsiders. Outsiders that live in estates, and view the world from the balcony of suburbia.
Some, like Sam, simply want an interesting story, or footage for their documentary.
The detective wants something more... he intentionally facilitates the murder of the black college student he entraps, which conveniently provides immunity for his own crimes. Equally as nefarious, Schiffer wants to fill her twisted psychological and emotional void, while playing her part in the death of the fallen.
Everyone takes at some level. The raunchy wannabe kids take what suits their pop culture identity, the women live out their momentary fantasies, the comedian takes a promising life.
As lost the lives of these inner city black men may have been, they were made much worse by the privileged pseudo-bohemians that interlop into their world, and escape in black limousines at the end of the night.