Bucky,
I have read a lot about the origins of 9-11-257 recently. 9-11-257 was never legislated for safety, the law was imposed to keep poachers from shooting into peoples property from the right of way of public transportation.. That is the reason that landowners are exempt from this rule on their own land.
That matches what the Attorney General described as the interpretation of DCNR back in '84. If they see if differently now, somebody needs to make it official.
The law in it's present form keeps people who lease the land from hunting all the land they pay for. It still doesn't keep poachers from hunting from the road and shooting onto someone else's property, even if it does make it unlawful to do so.