I grew up hearing all of these things as well. I watch all the crime shows, have read all the magazine articles on "what to do/what not to do." I even took self-defense classes in college. Unfortunately, being in the actual situation is much different than learning about the hypothetical situation that you feel so confident about. For one thing, shock sets in. It's not always easy to react quickly. Sometimes it takes several crucial seconds for the reality of the situation to sink in. I know that it was almost an entire minute before I could convince myself that it was real, and that it wasn't some weird, warped television show that I was watching. I can't imagine how a young teenager would react to something similar. We've both talked about it since and both agree that if we'd made it to the vehicle than we would have fought. You have an almost zero chance of making it out alive if you're taken to another location.
For the person who said he likely went on and did it again, you're right. Three weeks later, the same thing happened to a husband and wife. Same general area, same thing. They ran. They were both shot and killed. You take your chances either way. (He was caught. The trial was not pretty. It's my only experience of being in a court room.)
There are lots of scenarios that I look at and think, "Well, if it were ME then I would have..." But I've learned that it doesn't always work that way. When my son died in 2010, I threw all of that out the window. Now I plan as much as I can, but understand that, when the time comes, things might not work the way I wanted them to. Libby and Abby apparently felt threatened enough to go with him. Maybe they were lured, or maybe they were threatened. I think they did the best they could. At least Libby went down with a fight by recording him. To think of her terror at that moment, to maybe think she might not live, yet to still be able to turn on her phone. That was quick thinking and probably, considering the circumstances that we're not yet aware of, the best that she could do.