Take her to a local daycare and make her volunteer in the newborn, and toddler rooms for a week. I would think that would be enough to discourage her, however, is she is that attention seeking she needs to be in therapy now. That behavior is going to get her in major trouble.
If it were my kid they would be in lock down until further notice, no door to their room, no phone, dropped off and checked into school, picked up and checked out of school, and absolutely zero contact with anyone through electronic means, computer, phone, tablet etc. If she wants to talk to a friend, fine I call her, and then put her on the phone. Like it or lump it kid, I'm doing this so you don't end up in a ditch or carved to bits in some weirdos basement.
I have a a 14 year old and she hates me and her dad both right now, but you know what, she respects us, because we demand it, and do not allow any nonesense. In a few years she will realize what we do for her, and appreciate what we have done for her.