as a teenager we were floating the spokane river "they talk about on those forms", some guy along the river was throwing a chit fit about us floating down it fishing in his river and called the cops and the game warden on us. We got our licenses checked by the game warden and a ticket for littering, apperantly when the guy told the cop we were trespassing by floating in his river and the cop told him you do not own the water, he said we were throwing pop cans in the water which is what caused the issue in the first place. Which was a lie he just wanted to keep us out of his river.