The idea that we should hide or withhold obviously pertinent information - like the plot of a novel, movie, play, etc. in an article about same - has always struck me as anti-encyclopedia. Personally, I often look up articles on these subjects just to find out details of the plot... are you considering my needs as a reader when you make the paternalistic decision to scrub these articles of "spoilers"? I'm frustrated to find, on a regular basis, articles of this type stripped of all but the most general plot information - reduced, essentially, to the marketing blurbs put out by whoever publishes the content. Often you can find the plot information in the article history, and I've restored several of them, but who knows how many readers have come to the article hoping to see the plot and been disappointed by its absence? Encyclopedia articles ought to be comprehensive, and we rightly shoot down proposals aimed at the opposite.
~Nathan