Parece que pelo menos alguns azarões não duram após a morte do seu criador.
A partir da @ resposta da CandiedMango :
Em uma entrevista , JKR disse que
J.K. said that "McGonagall was really getting on a bit," and nineteen years after the Battle of Hogwarts, there is an entirely new headmaster. Also, there is a new Defense Against the Dark Arts teacher, and that position is now as safe as the other teaching posts at Hogwarts, since Voldemort's death broke the jinx that kept a Defense Against the Dark Arts professor from remaining for more than a year
* ênfase minha