Critical Research Failure: Sheriff Meeker and co. are "Haddonfield Police," despite Haddonfield being in Warren County (or Livingstone County depending on the movie). Consequently, they should be portrayed as county police because sheriffs are county - not town - law enforcement.
Dawson Casting: All the teenage characters were played by actors in their early-mid 20s.
Enforced Method Acting: Averted. During the filming, much care was taken to ensure that Danielle Harris, who played Jamie, was not frightened, especially by the actor playing Michael, who repeatedly removed his mask in order to reassure her that he was not going to hurt her.