If you mean your viewing history? Only you can see that. If you wish to totally remove your viewing history, you can check at the modify group(in the right rail) for a css code so that it doesn't show to you. You won't see it, but people will still be there.
If you are trying to keep people from coming to your site, you can't do that. People are going to land there. And when they do, you will see who they are and when they did. However, just set permissions so that only those you wish, can see your content. Then, even though people land there, they will only see what you allow them to see. You can spend hours a day blocking people. It doesn't change a thing. Even people who are blocked will show in your viewing history.
