"No, I did not turn off the lights, you paranoid nincompoop, I am a HAT. I don't have HANDS. Just because YOU have a small head..." the Hat trailed off, grumbling in her head for a few moments. "And it wasn't the cat either, I'm sure the cats know by now not to disturb you. Most have been eaten anyway. No, that was me, though that infernally boring Flying Machine took the brunt of it. How could you have been here all this time and forgotten all about me? Do you think you're alone in trying to protect Hogwarts? Is your complacency that vast? Or that you alone are the custodian of all paranoia, hmmm? There are others now, others who want to help, and some of whom might eventually need to use the common room. What are you going to do about that?