Ghostwatch
This movie single-handedly terrified a generation of children. Ghostwatch is a TV special hosted by the BBC about a paranormal haunting in the UK. They never claimed that it was a real documentary, but they never said it was fake, either. The documentary followed a group of reporters who were ghost hunting. They ended up getting attacked by the ghost, Pipes. The documentary even featured a "live" call segment where apparent viewers could call in about their ghostly experience. This caused actual cases of PTSD in young children and was subsequently banned from the network.