I own a truck. It goes maybe 60mph downhill with a tailwind. If you leave anything lighter than a popcan back there it is flying out. A square box has terrible

I own a truck. It goes maybe 60mph downhill with a tailwind. If you leave anything lighter than a popcan back there it is flying out. A square box has terrible and unpredictable airflow. Truck owners who keep trash in their bed 100% know and accept they are littering. Do not give these asshats a pass.