Depends on what you call a voyer site. Hidden cams and real unaware "upskirts" are illegal anyway. Footage of public nudity in a large gathering, I.E. spring break (or Mardi Gras
) has been ruled in the cases brought so far as reporting or documenting a public event. The cases that have been lost so far are those that used a single person in promotion (ie, box covers) without their permission. I'm not a lawyer so my opinion should not be taken as any legal advice. If you run such sites I wouldn't recommend posting anyone who looks questionable.