Cool.I am not a mod but i am a reader and member, so i think i have standing.
My opinion is that as long as the topic says "beware: spoilers" in the subject, it is fine - just dont spring them on us without warning. Some people (like me) often find stories more interesting after spoilers!
I would be more curious as i really don't like *not* knowing things. For those others, the warning will keep them away. Win - win!