When it comes to voyeurs who photograph or videotape up a woman’s skirt (known as “upskirting”) or snap a photo down a woman’s shirt (“downblousing”), though, “there are not many practical, legal remedies available to people who find themselves the victim,” says Anita Allen, a privacy expert and professor at Penn Law. That’s if the woman even realizes she is a victim in the first place, which is unlikely, as the voyeur typically manages to go undetected. If the photo or video is published online — which, increasingly, it is — it would be difficult for the subject to ever come across the material. Even if she did, how could she recognize one underwear-clad rear as her own?