WHAT SD feed? All the broadcast network affiliates are currently HD (they may have bugs and too much compression, but they still constitute HD.) I've seen cable companies carry down-rezzed analog feeds of HD stations, that cracks me up.
People who complain about complaining are real idiots- they might as well saying "Don't complain, if you do they might actually get rid of the bugs!" I had a letter printed in a local paper after ABC had joined the bug phenomenon, and they later printed 2 letters from other people saying how wrong I was for complaining about that.
The "Big 3" networks have a legacy of television history when TV was still a new thing, the people running them now are spitting on that legacy.