How can i Disable A Blog that Auto Feeds and Auto Blog My blog content Via RSS

First, go to Settings -> Reading in your blog’s Dashboard and set your feed to only show summaries instead of full text. The site will continue to steal your content, but they will only get part of it, and that part will direct visitors back to your site for the rest.

Next, I recommend reading these articles to brush up on the facts and prepare to file a DMCA complaint against the thief’s hosting provider:

http://en.support.wordpress.com/prevent-content-theft/

and

http://en.support.wordpress.com/content-theft-what-to-do/

Please do note that WordPress.com and WordPress.org are two entirely separate entities, but these documents are incredibly thorough, so worth reading regardless. 🙂