Proposal: EU creates an anti-spoiler law that all summaries of any work of fiction must be limited to a description of the first twenty minutes, followed by the phrase "and hijinks ensue."
Example: Three witches appear to Macbeth and tell him he shall be king. Macbeth tells his wife the story. The two decide the best way to make the prophecy come true is to kill the current king, and hijinks ensue.