Here's a photo of what people are seeing on TV. What's wrong with this picture?
Give yourself a pat on the back if you said, "empty seats behind the speaker".
Ever see a speech on television by the President (or a candidate for President) in which there are people sitting behind the speaker? You'll never see empty seats behind them; advance men have been fired over such things! Empty seats become noticeable after the viewer looks at something for more than 10 seconds. Their eyes naturally begin to wander toward the empty seats and their pretty blue color (or, "colour" in Canada). Those hologram images (found on sale at kiosks in every mall in the known world) that contain "secret" pictures of dolphins or unicorns if you stare at them long enough operate under the same premise. Whoops, went off the road there on a tangent. Let me get back.
Empty seats send the viewer messages like, "This isn't important", or for a candidate, "He/she doesn't have enough supporters to fill seats, so why should I bother to care about what's being said?" When that camera position was set up for the speakers' podium, those seats in that section in the back that are always on camera should have been designated as "must fill" seats. What does "must fill" mean? It means that, no matter what the day's attendance is, those seats are always filled. Give them all T-shirts and free sodas, whatever, but do what needs to be done to make the picture pretty. Some may call that "deception"; I call it "positive reinforcement".