To be fair, horror is a genre that can fit into a lot of different kinds of stories and you can have a sci-fi/horror story. Look at Alien, for example.
And I thought the way they've been using most of the Black Lanterns haven't been cheap at all--it's meant to be shocking, because the BLs feed on emotions and really, everyones reactions to the BLs are pretty similar to anyone who's friend or family member reappears as a rotting corpse who wants to kill you.
I'll admit the baby did sound pretty border-line when I first heard of it. I haven't reat BN: Titans so I can't really say for certain if it was used alright or not.