Being curious, as was ETEX, to what the outcome of the arrests was I contacted NPS Chief Ranger Wiley. He responded:
"We resolved another two cases just yesterday at court in Knoxville, again with fines and restitution that will help us repair and maintain the cannons. We've been very successful so far (it's hard to argue with video), but it will take another year, or more, to know whether the message is getting out to the public at large. As with most things, the law is pale reflection of the public opinion, and peer pressure is still the next best thing to common sense and a conscience."