Google has interesting feature to automatically generate RSS feed of websites, blogs that do not offer public RSS feed urls. We have already seen detailed procedure on how to get RSS feed of blogs and websites that do not have RSS feed using this Google feature. However, few website may not want Google to cache and generate RSS feed updates of their recent content. You can block Google from auto generation of RSS feed of your website using following procedure.
Use Meta name to block auto RSS generation
Add the following meta line to webpage that should not be included in auto RSS feed generated by Google. Google compares the cached and current versions of your page to determine if that page has been updated.
Adding the NOARCHIVE meta tag will prevent Google from caching your page. Alternatively, you can use robots.txt method to block Googlebot from accessing your content. This will take off your website content from Google search index (not many webmaster will want that!). [via google help]