4. The Forgiveness of Vader
The Moment: Luke knows that deep down there is still some good left in his father, so he is willingly captured with the intention of converting Vader from evil to good. He succeeds, Vader kills the Emperor, and the rebels win. The ghost of Vader's younger self is shown standing next to Obi Wan and Yoda in the final scene implying total forgiveness.
Why it's Dumb: Most crimes are generally considered ultimately forgiveable, but mass murder is one of the rare few that isn't. Let's not forget that this is the man who kills imperial officers on a whim and thinks nothing of it, is partly responsible for the destruction of an entire planet and in his youth killed an entire population of "younglings" in what was essentially a Star Wars equivalent of Columbine. We want to believe that Vader has refuted his past at this point, but a steep body count is hard to argue with; should we let Charles Manson out of prison just because he says he is sorry?