There are kiais at preset points in kata, I agree. But labeling any other kiai as wrong is what I disagree with. Kiais should be a natural extension of any punch or kick. Maybe a person decided to put a bit more effort into a punch or kick sometime and they kiai. I do not think that is wrong. Maybe awkward in a dead silent class . One of the things instructors got other students to do at winter camp was to kiai on every count of the kata.