Flatheads eating small ducks wouldn't surprise me at all. I would think that a flathead pond would be doable. Probably much like LMB you would have to limit the flathead numbers and have a good source of forage like BG. I know folks feed CC with pellets, I wonder if the same can be done with flatheads?
I've never caught a flathead but I would imagine the fight would be something else. I saw a Bill Dance special once in which he was fishing for flatheads, dang he caught some big ones, looked like a lot of fun!