Oh, there are so many that should never see the lights of Broadway - or anywhere else. I second (or third) Casablanca, any Star Wars, any Star Trek (dancing Klingons!Please NO!), anything that starred Johnny Depp or Al Pacino, any westerns (please, no REAL horse-operas), "Saving Private Ryan", or other war movies, definitely not "The Passion of the Christ". That's all the horrific ideas I can take for the moment.
Oh wait a minute: AI, ET, Invasion of the Body Snatchers, The Blob. I'll stop now.
"And the postman sighed as he scratched his head, you really rather thought she ought to be dead..."