You can get the gameObject that owns the current controller via controller.owner.
You can activate and deactivate actuators only
with the connected controller
only when this controller is the current one
This means you can’t activate/deactivate other actuators!
Using KX_Scene.objects[“name”] is dangerous if you can’t guaranty there is only one object with that name. Otherwise you would get any object with that name. It is also possible that this object simply does not exist.
You can deal with both situations, but you need to know that they are possible.