I'm not sure a 13 yr old would think about that. Also why would she record a guy coming towards her that isn't making eye contact and has his hands in his pocket? Why is that suspicious to an 8th grader....plus there is no way that little girl got that angle of height for the picture, not to mention this thing is zoomed in within an inch of its life...this guy was far away in this picture, he isn't a focal point.
I think they were taking photos and videos on the bridge. I think he was inadvertantly caught in the background of one - I do not think she did it on purpose. I have a 13 year old. They are huge into taking photos and making videos. They make random videos and Musically videos.