I think a line does need to be drawn, though, between a "spoiler", as in something that just happens in a game/story that you wouldn't know about unless you played it for awhile (I know the existence of Light Yoshi and Cloud Mario amounted to a spoiler for some, even though at least one of those is prominently mentioned on the back of the SMG2 box) and a "spoiler", as in a critical occurance/item/reveal that events before and/or after hinge on.