I am so sorry that you are going through this agony, please remember that good parents CAN have bad kids...I agree with Dolly, she's doing this to upset you...she KNOWS you are looking on Facebook and it seems she is very much "in your face" with her behavior.
Wow. I so disagree with this. I have a completely different value system. I would try to not take anything she does personally. This isn't a war between you and your "bad" daughter.