Histriomastix: Booing in the theater:
"The theatre loves ghosts as much as people love ghost stories. So whether or not one can say with any credibility what they are, ontologically speaking, one can try to account for their production through theatre. Theatre constantly encounters the dead, and the appeal as well as the doubtful status of ghosts goes to the heart of theatre's appeal. Ghosts, that is, pervade theatre more thoroughly than any particular instance of staging, to the extent that theatre itself is a ghostly place in which the living and the dead come together in a productive encounter."
Alice Rayner, Ghosts: death's double and the phenomena of theatre