It is important for us to have an accurate moral compass and conscience in our lives.  We need to be able to make distinctions between things that benefit ourselves and society versus actions that are detrimental.  Knowing right from wrong is an intricate sense that is developed and influenced throughout our lives.  We are faced with choices quite often in life, and we are able to learn from our mistakes after the fact, but the choices we make determine the path of our lives, regardless of if they are viewed as mistakes or not.  The way we act after realizing a mistake actually determines what kind of people we are.

In the story of Adam and Eve, Eve could possibly be judged for making a bad decision by eating the apple.    This is because God explicitly told her not to eat from that tree, and she did it anyways.  Specifically, God said, "Do not eat of it or so much as touch it, lest you die!".  After the act was committed, God punished Eve for her actions.  He said things such as "In pain shall you bear children".  For these reasons, direct defiance of orders and reception of subsequent, deserved punishment directly from God, one could judge Eve for making a bad choice.

However, there are also reasons not to pass judgement on Eve.  One could say that her choice wasn't a bad one because she didn't know that she had one, much less know what a choice was.  She was naive at the beginning of the passage, as evidenced by both of them being naked and exposed and not realizing it.  After they ate of the tree of knowledge, their eyes were opened to this fact and they were aware instead of remaining naive.  Since they were naive, this would've had to happen eventually for Adam and Eve to lose their naivety and gain awareness of the realities and circumstances of the world and life.  For these reasons, one could make a case not to pass judgement on Eve for her choice.

My position on this matter is that she didn't make a bad choice because she would've eventually made a mistake anyways for learning to occur.  The world wasn't going to be perfect and serene forever, and this original misdeed was the essence of what makes us human, imperfect beings.