Maybe something along the lines of:

A uniformed girl (like a girlscout or something) is selling treats on a popular corner.
Another rival troop comes along and beats her up and takes over her spot.
She runs home to get her big brother, takes him back to the corner. The arrogant bullies attack him with knives, which he takes from them; and kills them all, after holding down and "properly disciplining" their naughty little cunts.
In the end, the smitten little sister's on her knees worshiping her big brother's cock like a whore and still covered in the bruises she got earlier; while a "faceless" crowd cheers for the "hero" brother.
Maybe in the last panel add among the faceless crowd, on of the dead girl's mothers; crying from losing her daughter, but smiling and clapping for the hero anyway. As kind of a ironic, meta-level, "fuck you" to the dead girls.