That's what I said why people have to think before they do anything online. For this girl, she uses the same ID for different websites (that's very common). When she uploads her video to youtube, she has a login ID angeland. If you search it from yahoo or google, you can see a lot of related links to this ID. Other people can dig into different sites and look for possibly information.
If you see her posts in her blog and uwants, you would that she's not really feel regret. She just wants to stop people fingerpointing her for what she has done. At least, I don't see her saying sorry to the shop manager and feel that she has done wrong. She just say sorry to her friends and family members who are innocent but get involved in this case.