That is a phrase from Assassin's Creed, but you don't have to know that.
Taken out of its original context, how do you think it would describe the Touhou fanon and the nature of Touhou's canon (he gave you the bones to build upon)?
EDIT: God I think so slowly...
Anyway, how would the same quibble also apply to fandom taking certain liberties with established canon (loose canon)?