Some Practitioners of the Left Hand Path view the shadow self as the same thing those practicing the Right Hand Path view as the light body or astral self. This said, shadow travel is nothing more than astral travel and the alleged dangers would be the same.
If you e mail me a link to where you saw your information, Ill look at it for you and get a better feel of what your being told to do. Based only on the information you have provided, the binding is likely a way to bring you closer with death and demons, but I'm not sure. If that's what it is, it's not mandatory, it's just a way to bring you closer to what your seeking.
Best of luck.