http://img.guba.com/public/image/4/72/60269172-b.gif
They host the images. Do a search on fisting... torture... list goes on and on. Someone find a local prosecutor somewhere in the US to press charges for allowing such obscene content to be viewed, by minors no less, because it is without any form of acceptable age verification in the uncensored free preview area.
Not to mention the fact that they make possible the viewing of all kinds of content that Visa would never approve.
Or, if you just have tons of traffic and want to cause them headache simply hotlink their images and movies as they seem to be relatively unprotected.
Cheers,
Brad