I'm not about to stop feeding my fish, as I've seen the positive results that come from doing so. And certainly, every pond and situation is different, and requires a different approach.
However, I do believe that this thread has brought up an issue that seldom gets mentioned. That being the increased difficulty in catching fish that may arise due to an aggressive feeding program.
The key word being "may". "Fed fish are big fish". Yes, but it appears that "Fed fish can be hard to catch fish", MAY also apply.