This can be your work or another's, and it can be general or specific. I think the dumbest I've ever heard on my own work was this guy's complaint about some short story characters. The characters in question are supposed to just shout stuff out as part of a crowd. However, this guy wanted me to create elaborate backstories for each cameo, and flesh out my short story to the length of a novel. Uh . . . sorry, man.