Keep fishing. If he threatens you more, just take a video and call the local Sheriff's office and file a complaint. He only owns the priviledge of putting a dock there and technically, you could have jumped off on his dock and other than getting shot he could do nothing, APCO owns the water and allows you access. Unless it is Neely. There is only 1 place in the whole Coosa River chain where you own the dock and it is considered private property.