I think they can make really work if you want something to sound dingy, dirty and post-apocalyptic. examples from my work: 1) A long caravan of bony, starving people, wearing tattered clothes and smog masks trudge away from the inferno through a sand storm, accompanied by gunpoint at their flanks by the soldiers decked in jet black form-fitting body armor and gas masks with tinted black glass marching beside them. 2) A rusty monorail train, with barred windows and sheets of various metals bolted over one another in patchwork, glides along a monorail track suspended high above the undulating city streets where steam rises from manholes, weaving in, out and around the various decrepit skyscrapers of the oil-punk city of Veca, where the only light comes from neon signs advertising carnal pleasures or from burning trash cans. 3) Rain thrusts his hardened uncircumcised genitalia though the holey underwear into Lydia's matted bush, taking Lydia off her feet, ergo she locks her hairy legs around his waist, her eyes rolling back and her mouth drooling, intoxicated with the animalistic, rapacious pelvic punches delivered to her womb, brereathing her of air as each thrust slams her back into the locker, making an insurmountable racket. To explain that last one, I figured shaving cream would be in very short supply. I try my best to make the dirty feeling of the world prominent as much as possible. But anyway, on to the point. I really enjoy making these run on sentences on purpose. Is that frowned upon? Because I've seen books where "bang." is considered a real sentence. But I haven't seen anything outside of bad translations to ye olde epic poems actually have paragraph long sentences.