These are excerpts from the book "The Secret Life of A Satanist" which is an authorized biography of Anton LaVey, the founder of the Church of Satan. Just skip to chapter 12 and there is an entire chapter devoted to mostly horror films.
In this chapter, Anton talks about how he believes Vincent Price to be an avid Satanist on an account of his character in The Abominable Dr. Phibes being named Anton and playing the organ which is something Anton LaVey was rather good at. He also refers to the movie Freaks as Satanic in that it makes normal people look like villains and the outcasts as the heroes.
The Texas Chainsaw Massacre is also referred to as Satanic in that all the victims were "deserving ones." He was also consulted during the making of the film The Brotherhood of Satan, The Car, The Devil's Rain and The Omen because they wanted to fly the boy who played Satan's son over to the USA so they could film in the Church of Satan but Anton didn't want crowds of publicity. Television is also referred to as evil in that shows like Dark Shadows indoctrinated people into occult lifestyles.
If you don't believe me, skip to chapter 12 page 56 and see for yourself. This man has many connections with Hollywood and knows what he's talking about. These are not even all the examples of Satanism in Hollywood (not just horror films, but celebrities in general) he talked about. Horror movies are of the devil and you need to stop watching them.
http://cdn.preterhuman.net/texts/religion.occult.new_age/Satanism/The%20Secret%20Life%20of%20a%20Satanist.pdf 