There are currently 66 questions tagged with [ghost], and they are really inconsistently used. We have:
- Story identification 30
- Harry Potter 22
- “Force ghosts” in Star Wars 3
- Mythology 2
- Doctor Who 1
- Deadbeat 1
- The Crucible 1
- A creepypasta (story identification?) 1
- Supernatural 1
- Portrayal of ghosts in film 1
- Drag Me to Hell 1
- Combination of the Merlin TV series, Supernatural, and mythology 1
- The 1990 movie Ghost (starring Patrick Swayze) 1
By my count, that's 9 franchises this covers, plus story identification, mythology, and production history. The ghosts in all of these vary wildly in what sort of rules they follow, and I find it hard to imagine someone finding value in grouping together Harry Potter, Deadbeat, and a Patrick Swayze movie. Is it time for this tag to give up the ghost?