Reading a fanfic, and the authors notes basically point to a specific part and go "teehee! look at the clever foreshadowing!" I think someone needs to tell the author what foreshadowing is.
Also, a 'dead dove: do not eat' tag (an Arrested Development joke) unaccompanied by any other tags. Currently, this tag
usually means 'read the other tags, and don't complain about the content if you read anyways.' But this doesn't work if the author doesn't bother to tag anything.