Maybe it will be banned here in Brazil as well, but that doesn't mean people will be unable to get it.
I think this is only because of the reputation the series has. There are games which are much more violent, but if they don't spark a controversy, they will never be banned.
Anyway, banning anything is a stupidity. You can rate and even restrict selling them to people over a certain age, but banning? Makes no sense. It is as if they consider people a bunch of lunatics who will run amok after playing a violent game.