Zombie push settings(I know, read FAQ, it's diffrent)

[Hooray|Horace]

Ok I've had it on default turbophysics 1 , and pushscale 3 but then I could shoot the furniture and create barriers well, but I could also just break it apart by touching it, I didn't even have to use the action button. I've changed it numerous time like turbo 0, pushscale 5 and tried all the diffrent combinations, but the only thing that changes is the push scale, even turbophys at 0 you can still push it around. Right now I have turbophysics at -2 and I doubt the negative numbers work, and my pushscale is at 3. Anyone with settings where zombies can hardly push it down, and humans can barricade.