This title must sound very ironic given that the whole purpose of Google Latitude is to reduce privacy. I am not saying this is a bad thing, just that telling people where you are right now is less private than not telling them.
Recently, Google took the reduction of privacy a little further by allowing you to setup a web site badge for Latitude. Up until this point, you could only share your location with select friends, however, now you can share it with the whole world via your website, blog, etc. I do use this, so you can spy on my location if you wish.