I mean those who did not use the road at all, not just the ones who went around the toll collectors. Shunpiking is not using the road at all. Check out the website. Note the route the fellow uses here. Excerpt:
For example, I frequently have to drive between New York City and Philadelphia. There are several ways to do this, but only one is both toll-free and reasonably direct: taking either the Lincoln Tunnel or the Holland Tunnel (preferably the latter because it shortens the distance a bit) from Manhattan to New Jersey, taking U.S. Route 1 to Lawrenceville, New Jersey, and then picking up I-95 to avoid the toll bridge over the Delaware River. There are other routes that would save me time, such as taking the Verrazano Bridge to Staten Island, then taking the Goethals Bridge to the New Jersey Turnpike. But the tolls along those routes would add at least $20.00 - $30.00 to the cost of my trip. I'd rather spend that money on a decent meal than give it to the government.
One thing he glosses over: the tunnels from NYC to New Jersey are not free. Granted, they only charge one way, but, coming or going, he'll have to pay.