Quote from Eli Roth on the making of Hostel:
"I was trying to raise more money and we were talking about the sickest thing you could find on the internet. And he showed me this site where you could go to Thailand, pay ten thousand dollars to go into a room and shoot someone in the head. It said all these people were volunteers because part of the money would go to the family because they were so poor or had a terminal illness. And I thought, God, is this fake or is it real? And I thought it doesn't even matter because someone still thought of this and took the time to make site, you could go and pay money to kill somebody."
http://www.<modsnip>.com/newdesign/promo/hostel/interview.htm
(hope it's alright to post the link here to show where the quote is from)