I was at Atterbury on Sunday and 3 guys show up on the 50 yd rifle lanes. Well they showed up during a live fire and one of them starts to walk down range to post his targets! He made it out about 5 feet past the red line and the ROs started yelling at him. And not only did he decide to walk down range during live fire, he had people directly to the left and right of him firing at that moment. These guys got in trouble multiple times while they were there.
Shooters aren't allows to do any cross-lane shooting anyways, so he should be fine!