I certainly didn't join the National Park Service for big bucks, but out of ideals and love of both cultural and natural resources. It is my job to protect them in any place I find them. I follow all park guidlines today, whether state or federal, not because of my position, but out of a care of the resources. Most posting here would respect "out of bounds" camping, but some would undoubtedly abuse the setting and ecosystem in general. That is why the standard is set. Take a look at the constant abuse at Apple Pie Hill, and that's in a designated area. Its hard to justify the opening up of areas when on line sites are being damaged.
If the state of NJ could afford more rangers I am sure more locations could be opened up, but with budgets declining not increasing no one should expect to see an opening of back country sites. Perhaps limiting vehicle traffic would cut down on damaged locations and obnoxious parties, but that would be time and money the states not willing to shell out.. Enjoy some off trail hiking, its definitely fun and can be non damaging to the environment, but I would still warn against camping in non designated sites.