I workout at a college gym, so get a few of these types. I was doing band press on Saturday, and only had a plate on each side (+ bands). A smallish guy came up and asked if he could workin. I warned him the bands add a lot more weight then they look, but he said he could bench 300 pounds so I let him work in...
End result is he couldn't unrack it, he asked me for a lift off and I told him if he couldn't unrack it he can't lift it. He left with a slightly angry look on his face.