Just catching up here ...
I like to know beforehand if the toys have been broken so I can avoid a story which will only be upsetting. (i'm one of the last fans of "Lois and Clark" on these boards I think

) and so I appeciate a warning, whether it's at the beginning of a fic or in a separate folder. I also like to see them in archive descriptors and i do appreciate an author who is up front with her readers.
I'm also one of those readers who appreciates deathfic warnings - RL is about death and I read L & C fic to escape. But that said, I'm ok with Clark's death in some circumstances - for example in Wendy's FTGG, it would have seemd very logical for it to have ended with Clark's death. But I would have wanted to know it's coming, not be surprised by it (as a reader, I'm not into suspense <g>) Still I can see that writers don't like to give away their endings.
However, I'm not at all comfortable with fics which kill Lois - who knows why.

Perhaps because she's the physically weaker of the two and so more vulnerable -- it somehow seems like a cheap shot to beat up on her when Clark's physically almost invincible. But who knows?
So think the new warning folder is a good idea
c.