We gave up on putting a gate across her door or the stairs after she literally tore the last one to pieces - and it was made of wood.
The most horrible night of my life was when, at about 1:30am, we both were jolted out of bed with the sound of her falling down the entire flight of stairs. Amazingly -and thank the Lord - she was unhurt. Hubby, on the other hand lost his balance and threw himself over the bannister so he didn't land on her, and was in MAJOR pain for nearly a week.
He has NEVER turned out the hall lights again. And also never complains about how often he has to replace them!!!!!