Ralph may really be the worst in the final 4, but that isn't any reason the judges had to be so harsh on him. It makes me wonder how much the producers are involved with this tone--I suspect that if the judges were too nice each week the producers would eventually encourage them to show some emotions. I'm starting to think that a very small number of people behind the scenes control far more of DWTS than we want to believe. The only thing I really think is unscripted is the actual dances and the fan's scores. The rest is just a made for tv production designed to look like a live competition.
I used to think a show like Suvivor was the most heavily over-produced show on tv, and that DWTS was very lightly produced, but more recently I think they are not all that much different.