Yea, I've seen it. Doesnt do any of us sportsman any good for that to be lying around either. If people are going to clean their fish at the lake they should haul their buckets out to deeper water if they intend on dumping the carcasses into the lake before they load their boats up. Legal?!? No idea. Never asked but I do know on some of the lakes I've been on a few have fish cleaning stations that dumps right into the lakes. I would suppose the birds/turtles/raccoons/catfish and the such would take care of any remains they can find. To me it just doesnt look good around boat ramps for everyone to see.