Privacy?

Hello, I have found no more suitable forum than this to ask my question. During a blog visit I had to find out that on the right side there is a list called “Who visits me(s)” in which I stood as a visitor to the blog. Is it possible to deactivate this somehow? I don’t want other people to know which pages I’m going around on, which topics I’m interested in, who my friends are. If I wanted to do this, I would sign in to the fritzenbuch. Okay , I could log out before visiting blogs… but does that have to be?