The worst trick I have played is when a good friend and I were hunting together during deer season. We walked in on the same overgrown two-track road. We agreed that we would meet at the truck after shooting light was gone. Mother nature called, and I went #2 in one track of the road, but put the wiping paper in the other track. It wasn't too far from the truck, and when my friend came to the trap, he saw the paper and crossed over to the other track only to hit the mess dead center. I could hear him start cussin like crazy. Only flaw to my dirty trick was that I drove that day. My truck still stinks.
