The IP address of www.purenudism.com is 69.55.57.71, which traces to Brooklyn, NY. Not being interested in such sites, my personal opinion is that I have a choice of whether or not to visit them. However, to educate myself as to your dilemma, I visited the site and saw (without joining) one photo showing some naked adults with two naked, very young children shown from behind. I believe this sort of photography is protected by "artistic license." I had a difficult time tracking the Website using standard online tools, so I downloaded a free software called PingPlotter, which within seconds "hopped" from my IP address across various IP jumps used by purenudism.com and found It. If www.purenudism.com indeed shows full-frontal nudity of minors, it may be in violation of U.S. laws. In the U.K., the applicable law is section 1 of the Protection of Children Act 1978, which prohibits photographs or other likenesses of children 18 and younger naked whether engaged in sex or not, so long as the photos are "indecent," a term not defined by the act but left to juries to decide
(see third link below, under "The Law -- Elements of Offence). An interesting recent case was one involving actress Cate Blanchett, who made a gallery showing of nude photos of teenagers that resulted in charges being brough against her. She was cleared.

