Trouble is, it’s not that simple. What about things that were in “next week on 24”? What about things you read in TV guide but think are common knowledge? What about things from ads for next week’s episode? And what about in threads other than the “Heroes 10/24/08” thread?
This argument will probalby never be settled, but I’m certain that your description of it is FAR too cut and dried.
Here are my proposed guidelines…
For TV Shows
In the weekly “Heroes 10/24/08” (or whatever) thread
-Starting at the point in time when the episode begins broadcast on the east coast, anything that was shown on-screen during the airing of the episode does NOT need to be spoilered. This typically includes ads and previews.
-EXCEPTION: For certain shows, the thread’s rules treat the “next week on…” previews differently. In particular, in 24 threads, discussions of the previews must be spoilered. I think that should always be the rule but that fight appears to be unwinnable
-Speculation need not be spoiler boxed, although you may do so for dramatic effect. But if you do, please label it as speculation. (And be aware that, apparently, people with iPhones won’t be able to read it.)
-Everything else SHOULD be spoiler boxed. So you read an article in TV guide a week ago saying that (I’m making this up) Kiefer Sutherland is leaving 24 in the middle of the next season? And you assume that that is now common knowledge? Well, it isn’t. And some people don’t want to hear that. Don’t casually mention it in the 24 thread. Instead, put it in a spoiler box, labelled with “hey, I read in TV Guide that…” or something like that.
In other threads about the show, ie, the thread title is “A question about Lost”
-Spoiler box EVERYTHING that will come as a surprise to someone who is just now sitting down to watch episode 1 of season 1. Some people come to shows late and watch them on DVD. And those people might have just watched the first few episodes and feel like they want to open this thread.
-ADDENDUM: If the thread title includes “(open spoilers)” then it should be assumed that spoilers will be present for every episode of the series that has aired.
-ADDENDUM: If the thread title is something like “Question about Buffy season 3”, then things from seasons 1 and 2 need not be spoilered, but things from seasons 3 onward should be spoilered.
In other threads that do not directly mention the show in the thread title:
-This is a tough one. On the one hand, almost no one would get mad if you didn’t spoiler random plot points from shows that aired 20 years ago. On the other hand, there are plenty of fairly recent shows along the lines of The Sopranos that people are still watching for the first time on DVD. So I think you have to strike a balance between how recent the show is, how popular it is, how well known the plot point already is, and how much of a shock/revelation the potentially spoiled moment is.
For Movies
-For current release movies, thread titles should ideally specify “open spoilers” or “no spoilers” or “open spoilers after page 2” or something like that. As with TV shows, this applies to the things that you actually saw on screen in the movie, not inside information you might have from other sources. Basically, use common sense. If the thread was started before the movie, and generally contains people talking about how excited they are to see the movie, don’t immediately jump in and post, with no spoiler box, “hey, the butler did it!”. Similarly, once people are openly discussing what happened in the movie, don’t worry to yourself “uh oh, I’m discussing openly what happened in the movie, just like those people were, but I’d better spoiler box my entire post anyhow just in case”.
-For older movies, or in threads with no guidelines in the title, there’s again no one clear rule. Should we assume that everyone has seen The Dark Knight? What about Batman Begins? What about Tim Burton’s Batman from 1989 (or whenever)? I’d say that the older the movie, and the less important the spoiled plot point, the less important it is to use a spoiler box. But remember, there are people reading the dope right now who are 16 years old, who were 3 years old when The Usual Suspects (just to pick a random example) came out, and thus almost certainly didn’t see it in theaters. Have they seen it on DVD since then? Well, they might have. But then again, they might not have. So be courteous and thoughtful.
A few other general thoughts:
-The cardinal rule of using spoiler boxes is to make it clear, OUTSIDE the spoiler box, why the spoiler box is there. Is it there because you’ve already seen next week’s episode? Because you have seen the movie under discussion early? Because you read an article? Because you heard some rumors? Because you watched previews? The whole point of a spoiler box is that it’s something which some people will want to read and others won’t. It’s useless if people don’t have enough information to make that decision.
-Even if you don’t want to use spoiler boxes, it’s entirely possible to order your thoughts such that someone who doesn’t want to be spoiled will have a chance to skip ahead. Put the key spoiled information in the second sentence of the paragraph, with some warning that it is coming.
-There are still some tricky corner cases. For instance, while watching the HBO docudrama Generation Kill, I commented that I wondered how realistic one of the portrayals (by an actor, of a real life person) was, and someone else said “oh, I saw an interview with the real guy on HBO.com” (or something like that). Which, of course, meant that I suddenly knew that that soldier would survive throughout the miniseries. Should that have been spoiler boxed? Maybe something like “Concerning the real life fate of Soldier Bob, … [spoilers]”? While the show Deadwood was airing, if people had historical knowledge of what happened to the real city of Deadwood, would that count as spoilers for the show?