"Freshwater wetlands, home to a number of endangered species, are especially attractive to mud-loving riders and have been particularly hard hit, officials in both states said.
In one wetlands section of Wharton, a barren, muddy expanse is all that is left of what just a few years ago was grassland.Violators in New Jersey face fines ranging from $100 to $1,000...Little enforcement But catching culprits has proved difficult. Four rangers monitor Wharton's 110,000 acres of forest at any given time."
"They pay the fine, and they're still going to go back out," Bailey said. "When you pay that kind of money for a recreational vehicle, you're going to use it."
http://articles.baltimoresun.com/2001-04-29/news/0104290220_1_state-forest-new-jersey-south-jersey
Article from 2001. The maximum fine wasn't even adjusted for inflation by the DEP and we have fewer officers on patrol at any given time than in 2001.