I agree. Evil people have always existed and always will. No way of telling who might do what, Imo. Also, people who seem friendly and "safe" can seem very different if they are suddenly alone except for a potential victim.
Christina probably had no reason to be nervous of EA, if he is the perp (if he is not, my guess is a random, someone we don't know about, nor does LE) . But predators will always find victims, like Hannah, and are always be ready. One has to be in charge of their own personal safety and Christina did do this, by walking with someone she knew to some extent, and knew that at least some her friends knew him better. So she did take care and still met with some kind of monster...EA or otherwise.
Imo, she did the smart thing in her efforts to get home and still was abducted and likely worse. It is very unfair, tragic and despicable. I hate to think that it could come down to the threat of the death penalty to find out what happened to her...but I fear it is possible. Jmo