But that is a different case all together. If she didn't publish those photos, okay. Then publishing her photos is definitely reprehensible, ridiculing her is reprehensible, and trading those photos... Is probably wrong, but has no direct consequences on her, so I wouldn't be this quick to judge. The probability that someone who knows her will find the photos on the internet is not very high, is it?
Tell that to Angie Varona. http://abcnews.go.com/Technology/angie-varona-14-year-unwill...
More to the point, you are misunderstanding the stage at which the girl is victimized; when she is ridiculed. You are definitively blaming the victim if you think it's her fault that people other than her traded the photo around for whatever purpose leads to the teasing.