[A List Apart] The Problem with Passwords http://www.alistapart.com/articles/the-problem-with-passwords/
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
[A List Apart] The Problem with Passwords http://www.alistapart.com/articles/the-problem-with-passwords/