Creeper spawn setting

Please add a setting when creating the world where you can remove/turn off the spawn of creepers in survival. Since creepers would longer drop gun powder you could make the setting also increase the drop of gun powder from witches and/or ghasts. Many players including myself have trouble with creepers but like to keep peaceful mode OFF so there is still other mobs. Im sure this would make a lot of players happy but and making it a setting instead of removing creepers entirely will keep more players happy.