KFC has no reason to be proud of itself by offering The Double - except of course in the only way it counts - marketing. It truly is a gleeful triumph of "F*** You, Health Nazis". Bravo, Colonel Sanders, bravo.
In the future, aliens will discover the fetid remnants of The Double, and begin to piece together the downfall of human civilisation. Unfortunately they will cook one up as an experiment, and be doomed to repeat our mistakes. Take that, aliens.