Many were deeply unhappy about the treatment of Sansa and the inclusion of sexual assault against her that did not exist in the book's treatment. A lot of people said this was the final straw and vowed to stop watching the show entirely.
Before you grab your pitchforks or pat yourselves on the back, keep in mind that this step decline could just as easily have been the work of the Memorial Day weekend. Remember that sweet blissful three days you had off? Those were the days.