Honestly parent......
Anne Bonney's right, she's not doing anything so drastic, it's scary and I know how you feel about it getting out of control, but really, they do this stuff, its normal to not be normal if you like, its just a rebellion against what society expects of her, I've been through this with 3 boys and they are all still alive, just about admittedly because I swear i've wanted to kill them enough times, but they are alive, they have never killed or mugged anyone, they still need a kick up the butt now and then, but even after everything I have been through and am still goign through, I am still glad I never sent them away, being a parent is worrying and scary and of course your child is going to make you grey before your time, just grit your teeth and bear with her, she'll soon bore of it all as she matures, and especialy when she thinks it isn't getting at you anymore.