Nichita - 7:30 am on Nov 14, 2012 (gmt 0)
You cannot do many things. I suggest you to minimize the length of the feed and to block the scrappers from .htaccess file. I am in the same situation.
I've deleted a lot of content via the DMCA reports but the scrappers sites are simply infinite... They don't stop the content stealing. If you kill one, two appear in the same place.