I agree noise is the #1 causal factor in all this. I wish to hell they would just ban all noisy aftermarket muffler sales to start with. And it's not just in the forest... In Brighton, quiet little rural town, we have some kids who tear it up endlessly in a field owned by the family, with bikes so loud you can hear it throughout the town. But, since they're on private land, "there's nothing the police can do". Like really, I know riding bikes is fun, but why does it have to be loud?!