I'm one of those sick looney tunes who actually collects animation cels from "The Real Ghostbusters," so obsessed with the show am I (I actually have a sequence from one episode with Ray turning to Egon, who is climbing bravely out of the Ecto-1). I interviewed Reeves and Stracynski both at various times and as adventurous and Lovecraftian as the ones that made it to air were, both talked about getting censored time and time and time again by the network who kept saying, "Oh, wait...you really CAN'T do that..." So, they had a lot MORE crazy horror ideas for the show that never made it.
Talked a lot with Reeves about the fact that he wrote on "Go-Bots" and "Transformers" as well (I'd think that would be like being a floor manager at Macy's AND Gimbel's, but oh, well) and he said that censorship wasn't the problem with moving the show along there, it was the CONSTANT product placement pressure where everything was about selling a toy and it would always get in the way of storytelling.