Hitting your shin on this will hurt. Very. Much. I finally found a way to solve this issue.
You will need a sock wide enough to cover the metal part and plastic bags or air-filled plastic mailing material.
First fit the sock around the metal part. A stretchy type sock works best.
Use extra plastic bags to fill the sock.
After the sock is completely filled with plastic bags cover it with the bed skirt.
After the comforter and bedskirt are in place you really cannot tell that the "protector" is there.