We already have a version of amnesia (pacification), and things like Charm and Confusion would never work in this kind of game, as you are not FORCED to input commands, nor do you even need to stand within range to inadvertently attack an ally. The only way I could see that they would implement confusion, would be to make it so it jumbles up your controls (EI, up makes you go left, you hit skill key 1, it throws skill key 4), however this would just make people stop doing ANYTHING until their confusion was gone, and would make it equivalent to petrify, and therefore redundant.