I think I'd sneak in there at night with a few guys and cut those off - or at least beat them over with a sledge. Five Flags in Pensacola didn't have a wall for years - except on the front stretch. At night you couldn't see the edge of the track on the back stretch, so we asked the owners if we could paint a white line down the straight. They said NO!. I guess guys hooking the berm and heading down into the woods and into the creek at the bottom was exciting.