I'm also pretty appalled that students supplied the same answer down to typological errors. When the scandal first broke out, it sounded much more mundane - that there was little guidance, and that students asked their TAs for help. At least then, it's possible to rationalize the situation by saying that students genuinely did not believe they were doing something wrong. I don't think there's any way to justify multiple students submitting the same typos. This indicates blatant cheating, which any Harvard student should readily recognize as being morally wrong, and clearly violating any reasonable academic honesty standard.