Imaro
Legend
EDIT: If we do accept that Rule Zero negates player power, then that would equally apply to narrative metagame mechanics. It would mean that a player using the original Come And Get It power for instance *doesn't* have any power over the game space beyond that possessed by his character, because any use of CAGI could be Rule Zero-ed.
Rule zero is always an option, and yes if the DM invokes it as far as CAGI is concerned it does negate the power over the game space said power gave the player... But that rule (the CAGI power) is specifically built to empower the player to change the narrative, finding a random rule that the DM forgot doesn't empower the player to change the narrative, depending on what the rule is it may not empower the player at all. I think you are confusing influencing the game and influencing the narrative. I don't think anyone is arguing against the fact that all players have the ability to influence the game, cheating is influencing the game... but it's the narrative we are speaking about.