The cars i have have hit have all been drivable only one of only 5 was drivable.... just.... writen off cause of cost to fix (early 90's commodore) there has only been injury's sustained in the accidents in my old falcon's that had plastic bumper's on 'em.
And also i'm pretty sure if your caught in W.A. with a 5 post bullbar on a vehicle under a certain Gross Vehicle Mass you will have a canary (defect notice) put on your vehicle.....We will have to watch and see