The ethics of spoilers

[nmg]

While we were putting up the new shed a couple of weeks ago, elseware and I had a debate about the ethics of film/play/book spoilers, and what one should take to be common cultural knowledge. We didn't come to any sort of agreement, so I've decided that the best option is to Ask LJ with a poll. The poll below is under a cut because it contains spoilers for the following films, plays and books:

• Hamlet
• Citizen Kane
• Casablanca
• The Third Man
• Psycho
• Waiting for Godot
• The Empire Strikes Back
• The Wasp Factory
• The Crying Game
• The Usual Suspects
• The Sixth Sense
• Harry Potter and the Half-Blood Prince

If you haven't seen/read any of these, and don't want me to give away the ending, do not look behind the lj cut. You have been warned!

[Poll #853047]