fuck that bitch dude. I say that you make her some brownies like other people have said, but instead of weed sprinkle some coke on it and say its powdered sugar. Or put some acid, or crack, better yet, get all the drugs you can and put it in the brownies. Then give her the brownies and tell her that you wanted to thank her for doing that, and it changed your life. Then get her in your car, and drive her far as hell away. She'll be all fucked up and what not and then she won't find her way back.

Damn, I kind of wish something like that would happen to me, cause it sounds like a good time getting pay back. And I learned that if anyone ever does that to me, I will grab all of me weed, pipes, and other weed stuff I have out, and just yell "RUN AWAY!!!!!!!!!!!!!!!" Then proceed to run like hell.