If you decide to have a blog, it is because you want people to know what you are typing, or saying, or thinking, or doing.
So then if you get all mad that people are reading your blog, and then you decide to delete it, maybe what you really want is a diary.
I have a blog to share what I feel is important, or funny, or silly. If I don't want the world to read it, I don't share it. :)
Happy Blogging Bloggers.