@DaveFlash Because once a Twitter app has your username and password you can't know what they do with it unless you see their source code.
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
@DaveFlash Because once a Twitter app has your username and password you can't know what they do with it unless you see their source code.