Then say that - don't say:
See the difference?
The second is a personal attack, and does hurt other people's feelings. And guess what? There are a lot of 13 year olds on this board. Take your own advice, get your point across without telling someone they're stupid because they don't agree with you or aren't articulate enough for you.
My judgement was not clouded. While your argument that she stayed in jail does say something about her character, you can't say that prooves beyond the shadow of a doubt that Faith is no longer evil. That might be your opinion, but that doesn't mean it's the only opinion.
How do you know she had the opportunity before to escape? Perhaps her state of mind was such that she didn't want to before. Perhaps she was trying to reform. I don't know, but what I'm saying is that there are multiple explanations for why she might not have escaped. There are plenty of people in prison...and they don't all try to escape. That doesn't make each and every one of them good. And one act of goodness does not necessarily make a person good.
Personally, I don't think she's completely evil, but she's not completely good either. She does what she does in S4 out of her loyalty to Angel...not because of some higher moral purpose.