Ghoul note is the name of a paper note found on the body of a ghoul wastelander in a random encounter. The encounter may appear after the player finishes the Tenpenny Tower quest. There are two different versions of this note depending on whether you chose to let the ghouls into the tower or not.
Transcripts
Version A
This version appears if you have let Roy Phillips' ghouls into the tower.
Brothers and sisters! We have over-thrown the bigoted smooth-skins at Tenpenny Tower. Come live in luxury! Kill any smooth-skins who finds out we are in control of the tower. And bring lots of firepower and righteous hatred with you. We will certainly need to defend our new home.
Version B
This version appears if you killed Roy Phillips and his followers.
Brothers and sisters! Roy Phillips and his righteous band of diplomats have been massacred by the smooth-skins at Tenpenny Tower. It is time we arise and show the world that Ghouls are people too, that we have the same rights as everyone else, and that we won't placate and bow down to their bullshit any longer! Bring lots of firepower and righteous hatred with you. We amass at Warrington station. The revolution has begun!