Crazitivity is that sort of creativity that is solely driven by desire to be different. Creativity is always new and different so the belief is that something new and different is necessarily creative. I have no objection whatever to this belief and this style of 'creativity'. My only concern is that people should equate crazitivity with creativity. This would be a pity and would be a great disservice to serious creativity.
Creativity can be low key, simple, unostentatious and very logical - in hindsight.
In the advertising world something that is crazy may catch attention and may therefore have a direct value. This is seldom the case elsewhere. Bizarre does not attract attention in general. So those who want to make a statement or parade their disdain for normal conventions may seek the cazivity of bizarreness. There is nothing wrong with the motivation to seek to be different.