At one public land west of Inwood Iowa, a couple of guys were peeing various bottles. They would toss their pee bottles in a ravine on the way back to the car. After a couple of years there dozen of them. I found them when I saw one of them toss something from the edge of the woods. Yes, I wrote down the license number and called the game warden. I believe in leave no trace hunting on all public ground, so, quite often, I pee on my boots. That's my story and I am sticking to it.