I was also quite upset over a similar situation but now google seems to have made it easier to "block" people who follow you. As mentioned in this article http

I was also quite upset over a similar situation but now google seems to have made it easier to "block" people who follow you. As mentioned in this article http://lifehacker.com/5470104/google-updates-explains-buzz-privacy-setup http://lifehacker.com/5470104/google-updates-explains-buzz-p... Now there is a block link again anyone following you (once you unfollow them).