Lame_Wolf - 11:30 am on Nov 15, 2012 (gmt 0)
Forget going to the site owners. Raise a DMCA to their hosting provider. Sometimes, the ISP will tell you to contact the owner. Doing it this way (for me) receives better results - and quicker. It also alerts the ISP that they have infringed someone elses rights.
In the past, I sent so many copyright notices to many site owners to remove illegal content, but with limited success
If you do decide to write to the owner, add something like this...
Do I raise the DMCA with you, or your hosting provider?
(If you know the hosting provider, mention it in the email) Works like a charm.