This http://www.eros-ny.com/files/131984.htm is actually Areeya who as I understand it does not come to the US.

....that slide!  Damn, it's so freakin' obvious.  So, how does one go about alerting EROS?

They've got a web form for contacting them, but they deny all responsibility:

"The content of all ads appearing on one or more Eros Guide related websites is provided by independent advertisers who are solely responsible for such content including, without limitation, all text and images. The ads are provided for informational purposes only. We do not control, supervise, verify, investigate, authenticate or endorse any of the content, information, materials, communications or representations posted on our websites. We assume no responsibility or liability for any content, including, without limitation, the accuracy, completeness, or truthfulness of the ads."

Though I suppose someone could file a DMCA takedown request (presumably the original photos are under copyright somewhere) ...

as per most take down notices or copyright laws.. only the copyright owner can send the webhost the letter to remove the image. The best way is to have the photographer or the actual model send the hosting site a DCMA letter.

The owner of they copyright of an image is USUALLY the photographer.. in some cases the photographer might give shared copyright to the model.

It is the copyright holder's responsibilty as it is an infringement of his work.

Rarely, but in some cases if you provide PROOF, a host will remove the image even if you are not the copyright holder.

Which ad are you referring to ?. That link gave the whole list.

The ad has been taken down so the link now dumps you on the page with the list of ads.