George,
If being pellet trained would disqualify a fish, so would any other "unnatural" means of breeding, stocking, keeping, and feeding fish. In another vein, what if bass feed on Tshad that you artificially stocked in your pond, and you make a fly that mimics a small Tshad? I don't really see the distinction between flies.
In my way of thinking, everything about a constructed pond is either natural or everything is unnatural. ( I go with natural!) It all depends how you look at it. What good does it do to use all natural bait when the pond itself is an unnatural hole in the ground?
I can understand how rules would be set up to make things fair in certain competitions, however. How's that for waffling?