Knowledge of Good and Evil

I have often wondered why eating fruit that gave knowledge of good and evil was a bad thing. Isn't knowledge of good and evil a good thing? Don't we expect parents to teach their children the difference between wright and wrong? I think that the knowledge of good and evil that occurred after eating the fruit caused Adam and Eve to be judgmental. That is why they covered themselves, because they did not want to be judged.

2/17/11: It also explains why they where kicked out of the garden of eden, because they would have found fauit even with Paradise.