This policy setting prevents the user from subscribing to or deleting a feed or a Web Slice.If you enable this policy setting the menu command to subscribe to a feed and the menu command to delete a feed are disabled and access to Web Slices is turned off. A developer cannot add a feed or Web Slice or delete a feed or Web Slice by using the Feed APIs. A developer also cannot create or delete folders.If you disable or do not configure this policy setting the user can subscribe to a feed or Web Slice through the Subscribe button in Internet Explorer and delete a feed or Web Slice through the feed list control. A developer can add or delete a feed or Web Slice by using the Feed APIs.
Windows Components\RSS Feeds
At least Internet Explorer 7.0