Because I lecture and teach on this topic, I've been working with issues related to child sexual exploitation and child porn on the Internet since 1986.
I'm the only gal on this page, this was years ago when I started as a volunteer.
http://www.ncmec.org/html/news_cyberphotos.html
So.... I KNOW how pics like that might be used, I KNOW they can pose a direct danger to the child/minor/cheerleader/swimmer/baseball player, etc... And I've seen 60 pedophiles all discussing a particular picture one has shared with the others and the types of actions they discuss wishing to perform on that child. If the "photographer" cares to share the name of the school and location where he took the picture, the MINOR is very vulnerable.