Depends on how the shutter dial is constructed. With an early camera that has the pointer on the top of the camera, after you fire the shutter you don't know what speed is set on the dial, so you don't know where the dial rotation stops. I would suppose a heavy handed person could twist the dial around past the stopping point and damage the pin/plate system. With later cameras where the pointer is in the center of the speed dial you know where the stopping point is and you know how to set the dial.
Originally Posted by AgX