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
apparently you can actually search the logs and no Tom Hanks or initials show up. I'd be skeptical of every list at this point.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.