Well for many a month now I've wondered how to not spoil things in the fan fic forum when discussing a story. Animesuke has a little spoiler tag where you have to click to read the quote, but thats on different from IPB.
However lo and behold rave did something obscenely cool with quote and color tags
for sheer irony, if you want to try and figure out you can try, or you could highlight the spoiler quote ~_^
[ QUOTE=SPOILER!] tag and the [ color=#031D1F] tag then you say what you were going to say "wow, I didn't know that so and so dies and the end of the story, or wow, I think it's cool that the elite squad of TSA made it off the station in the nick of time. Then it is vitally important to close you tags [ /quote] [ /color]
and voila, one spoiler free post
in short, it's a working viable way of discussing a story in it's thread without ruining it for the people who haven't read it, and you don't have to do any more *** SPOILER *** type stuff