I am of the anti-rss feed group.
Not too many people actually set up so many rss feeders to grab new posts, and sites, etc.
If they do, it is if they visit your blog and get the rss feed there.
RSS I believe is a dying creation.
I for one don't use RSS feeders and readers, etc.
I want news, I go straight to the news source, not wait for some rss feed to let me know.
Or twitter...think twitter is used more and by more more than ever used rss feeds.
So, waste of time to worry about posting anything to rss feeds and rss directories.