They legally can not do this to you, SO DO NOT LET THEM!!
Tell Courtney! Now!
Call for help! Call the number the person above me posted! I do not mean to offend but your parents are crazy, there is no "devil" inside you or anything of the sort! Hell I feel ridiculous actually having to type such a thing in the year 2012. Fuck. I repeat: YOU DO NOT HAVE TO GO! You could just sit on the floor and refuse to move or eat and legally they can't do squat. And if they even tried to send you away for brainwashing by physical force, you can obviously at that point call the cops. Heck, now that I think about it you can call the cops and tell them that you feel scared or endangered and have them take you into "protective custody", I'm not sure if that is the actual legal term for it but it is a real thing as I have had to deal with it myself. If a child feels endangered by their parents for any reason and calls 911 over it, the police are literally not allowed to not do something about it.
And I know it might feel bad retaliating against your parents oppression like this because I've been there too, (and I'm doing great now!) but parents are supposed to love their children unconditionally. No one should be doing anything like this to anyone. Espscially parents doing this to their own children. On a personal note, this makes me sick.
But regardless, don't just sit there and take it. You can fight back.
And go on to live how you want in a bright future.
Please. Do something.