A.L. is messed up in the head. She is angry and scared and off her rocker sometimes.
That said, I don't think she is doing any of this just to be mean. She has issues, BIG issues and a twisted view on what needs to be done and how to do it. But, she did what she thought was right, like Sayid said to keep the other people in her group safe. She's human and flawed like the rest. I'm glad to see Sayid forgive her. He needs to focus on other things.

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Hope is a very dangerous thing to lose. - Sayid

I do what my Rice Krispies tell me to. - Anonymous