'''"The Warning"''' is a song hinted at in PDF lyric sheets of ''[[With Teeth (halo)|With Teeth]].'' The song's lyrics were not legible on the PDF. It is not known if it even was recorded or not, along with "[[My Dead Friend]]," "[[Message To No One]]," and "[[The Life You Didn't Lead]]," the latter two also hinted on [[nin.com/with_teeth|various posters and PDFs]]. "My Dead Friend" was hinted at during an interview pre-''With Teeth.''
The song "[[The Warning (Year Zero song)|The Warning]]" is based on this version. It was later released on [[Year Zero]]. When the 2019 Definitive Edition vinyl of ''With Teeth'' was released, the PDF was re-created as part of the packaging. Lyrics to "The Warning" were made legible and it was finally revealed that the track "[[The Warning (Year Zero song)|The Warning]]" from ''[[Year Zero]]'' has its origins in the track from the ''With Teeth'' sessions.
Interestingly, the line "celebration of ignorance" was later used in "[[Ahead Of Ourselves]]" from ''[[Bad Witch]]''.