I will fight this w/ every scrap of my existence................
I wouldn't worry about JORBA turning your favorite trails into superhighways. There's too much great terrain in Jersey that you couldn't get to with a Ditch Witch without throwing the track every hundred feet or watching it tumble down a rocky sideslope.
Machines are really good for three things- (1) beginner/multi-user trails that most of us on this forum won't be riding much anyway, but which are an important part of bringing new people into the sport as well as providing a reason for other trail user groups like walkers, joggers and equestrians to support mtbers (since they enjoy such trails, but rarely if ever *build* the trails, and none of the parks departments have funding to build new trails like that), (2) trail remediation, ie rerouting and covering up older, poorly built fall-line trails and carriage roads that would be nearly impossible to do by hand but which is an important part of mtb'ers contribution to overall trail health, and (3) dirt jumps and other man-made freeride-ish terrain.
We've shied away from machine-built XC trails in NYC, because they're initially too wide (even though they do get narrower as time goes on) and that width would attract negative use from ATV's and motos. But I can see how a machine would come in handy over the next decade of trail building, trail remediation, and technical feature building all over New Jersey.
Nice work, JORBA!