If I am understanding the discussion correctly, it would appear that whether the trout was "farm-bred" or "wild" is only a small part of the possible issue.

As far as the difficulty of catching a wild vs. farm-bred trout in the exact same body of water, I don't think there is a difference. A farm-bred trout and a wild one in the same mountain stream can use the same camoflage and is free to flee when a careless fisherman kicks a rock into the water or draws his boat too near. The trout definitely doesn't swim around with any notion that his pedigree dictates his instincts once he has a hook in his mouth. However, I think the problem evolves when you hit the "fish in a barrel" state.

I think there is a substantial difference between putting on a pair of waders and wandering around like Lewis and Clark or someone breeding a huge fish and putting it in a limited environment designed for one purpose: catching said trout.

If we are discussing the validity of records set in a controlled fishing environment, then I think many of us are more in favor of putting an asterick by the record. I personally believe that such environments are for entertainment and enjoyment (purposes at which they excel, in all fairness) but, they do not constitute a level playing field from which records should be born.