"Voyeurs have created online communities, where they share and sell work, trade tips and egg one another on toward more and more exploitative photos and videos."

"In the process, victims are often exposed to exponentially more eyeballs.... Schklowsky, who taught drama and directed school plays... stashed at least one small camera in a drama department changing room to capture students as they undressed, police said. Such cameras are part of a generation of devices so small they can be hidden almost anywhere. Voyeurs have also turned to a range of devices embedded with cameras. A Johns Hopkins gynecologist filmed women with cameras in pens and phone chargers. A D.C. rabbi used a clock radio with a hidden camera to shoot women who were undressing for a ritual bath. A thriving online marketplace has even more devices: miniature cameras embedded in sneaker tops, shaving cream cans, electric razors and scales...."

From "One accused teacher, 8,000 dirty images: A school’s exploitation shows no place is safe from hidden cameras anymore" (WaPo).

By the way, the headline is terrible. There's nothing "dirty" about teenagers changing their clothes. The evil is in the behavior of anyone who invades their privacy. That evil is not in the pictures. The pictures are evidence of a dirty mind, but it's inaccurate to write "dirty images," and it shows the insidiousness of victim blaming, which I'm sure The Washington Post did not intend.