Wisconsin has a statute that is used often on overbearing land owners.
We have a keep your feet law and all public bridges are accesses and anglers
can fish as long as they enter at public area and stay with wet feet.
Len, that guy also left himself open for a huge lawsuit. If any of the anglers had any injuries there are lawyers out there who would take that case for a cut of the award. That is just plain dumb.
That said in Georgia, as I understand it, I have not looked up the statue, if you own the land on each side of a stream you own the water and can prevent anyone from floating, wading, etc. in the stream. There was a case where a landowner shot a guy in a boat and got away with it.