[Stroon]

when i was a teenager i slammed a door or two.
It was a frustration thing for me.
Unless she is hitting people, i wouldn't class it as violence.
Sometimes i'd have a lot of frustration and anger inside and doing something like slamming a door, breaking glass, kicking the wall etc would help to diffuse it.

A few years ago i found i had alot of pent up energy and frustration, so I joined a gym. it was amazing, physical activity works wonders for relieving stress.
Not saying this would work in your case, but i certainly found it very helpfull.