I love that there a few monsters in the village of barovia at night, sure maybe a few. But it is a village, now perhaps the undead from the crypt could rush out during night, that would be interesting. But I hate all the rats in vallaki, makes me feel like I am in richmulet and not barovia.
And besides, If I am not mistaken there is a reason for the screams in game. It is a sorrow filled village, but I love the place.