Murderous monstrosities haven't got a clue about stalking their prey.
Take your Lions and Tigers, when seeking a kill, they stalk through the grass, as quiet as quiet can be until they're ready to pounce.
Not so supernatural entities or killer chimeras!
Why do they insist on burbling and groaning all the bloody time? I just watched Darkness Falls, where (by strange coincidence) when darkness falls, out comes the toothfairy to slaughter her victims. But does she creep up in silence - no, it's all shrieks and gurgling to draw attention to it!
Now, if I was one of these ethereal entities hell bent on doing in nubile young teenage lasses, I'd be dead
Silent until I snatched them into the sky, not going "Ehhhshhhkkkrraahh" as I approach!
It's like the police - why do they drive to burglaries with sirens a-blazing? How you supposed to catch the little tea leafs if you advertise your presence? If some burglar is in mid-burgle, and hears a siren approaching, he's bound to have it away on his toes before the Filth arrive, leaving the coppers scratching their helments in puzzlement: "He's long gone Sarge", etc.
Hold on, I can hear something...
ssseeerkaaaahhhhkkreeeaaak
Excuse me whilst I go an investig.... AAAARRRGGH!