Getting wishes from an Efreeti

[Darg]

"Reasonable request" clause of planar binding is paper thin. Tome of Magic has a Balor that's been enslaved by a wizard for 500 years for effectively no payment. MMIV has a lich that uses whispers demons as shock troops and intentionally hits them with his own area of effect spells. ECS specifies that you must use Planar Binding charisma checks to compel an elemental to accept bondage in order to use the bind elemental feat to create the Eberron specific elemental items. There's basically no room to auto deny any request that a player could be expected to make from a creature unless he's Chaotic Evil and trying to summon up some demons to kill themselves for his own entertainment.

It's only as paper thin as the DM wishes it to be regardless of what WotC/Paizo has written. These statements were written specifically for that purpose.

I agree, but if this is your stance you don't need to argue anything at all about how Efreeti wishes don't work. The system in which you're arguing features spells that put the victim under the complete control of the caster and make them their best friend; it's going to take some pretty bad faith, out of character, logic to deny a wizard his free wishes. Just tell your players it doesn't work because you actually want to have a functional game.

How is it bad faith? Bad faith is doing something specifically to try to break the game in the first place. The only reason you think it's bad faith is because you don't want your freedoms infringed. It's ok, you don't need to play with big bad restrictions.