This may fall under the Sportsmans Harassment Law (paraphrase). Your neighbors seem to be blocking your access to enjoy public resources that you have paid for a license to enjoy. In the law's eyes, it may be the same as somebody physically blocking your access to public land because they don't want you to shoot bambi. This is against the law. We have rights as sportsman to access and enjoy these resources. If your neighbor is impeding that from your own property, you may have a case. It might be a stretch, though. Not sure. You'll have to contact a lawyer.