Scarecrow was used perfectly in the Nolan films. He was the embodiment of fear in Batman Begins. To show that Batman has tackled not only his fear but erased fear of criminals in Gotham, they reduced the Scarecrow to being tased by a woman. Fear had been conquered. In the Dark Knight, Crane is seen only shortly with the mobsters in the beginning and is visibly nervous when Batman comes around. This is to show that not only do the people of Gotham not fear crime because Batman, but criminals fear the Batman. Then, finally, in Dark Knight Rises, Crane becomes the judge in the Bane taken over Gotham. This symbolizes that with Batman gone, Gotham was run by only fear and justice had no place. The Nolan trilogy is very artistic and symbolic. To take any of his characters at their face in only a storyline does an injustice to them and the piece itself.