He didn't allow any of the other Akatsuki members to go to Konoha, and even threatened Danzo to make sure he knew that Itachi was never too far from him and his ANBU and Root members. Genjutsu is ...

"You are already under my Genjutsu." - Itachi. Given the potency and ease of using genjutsu, why does it seem like it is never a thing to be feared as the series continues? You would think that a ...