What if someone finds a box of photos containing some of your children in their underwear and scan them and trade them around the internet? Not all photos online were intended that way by the person who took them. To assume this is very convenient to your argument but not realistic in the broader view of what is being discussed.
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.