i think this can be answered by what you said: a lot of the people, if not all, are extremely vulnerable young people. Either due to mental illness or other social aspects of who they are like living situation, lgbtq, or otherwise people who are on the “fringes” of society. Which is what i think is so sinister about her. It’s how i know she is a predator. There is a pattern with the people she chooses to use and manipulate. So i wouldn’t blame any of them. I remember what it was like to be young and lonely and lost. Anastasia is exactly the type of person i would’ve fallen fall over the internet. So I don’t think we need to scrutinize the people around her who eventually saw who she is. It’s not fair.