How do I get rid of my Tumblr followers ?

It seems that somehow my tumble-log is famous. After being featured on Tumblr’s Staff Picks and Sweet Themes section, I have over 300 “followers” who absically subscribe to all my posts and have an option to re-post anything I post. The problem is I dont like having so many followers and just dont like the idea of strangers following me. So any idea how I can get rid of them ?