IMDB doesn't warn you about spoilers. I just stumbled across one for the Sex & The City movie. Damn.
(If you're going to see the movie, I'd suggest not visiting the IMDB entry for it. The spoiler is right near the top on the front page.)
Update/clarification: IMDB discourages users from posting spoilers... or asks them to provide a warning. But it doesn't police them, and doesn't have any method of hiding plot keywords that may be spoilers in and of themselves.
Second update: It turns-out the plot keyword may have been a hoax... a "
foiler." Thanks to
pomebugga for reporting that.
Third update: Woah. It wasn't IMDB at all. Read
this.