"I am worried about the ability of Facebook and others to manipulate people's thoughts in politics or other areas" > http://www.bbc.co.uk/news/technology-28051930?ocid=socialflow_twitter …
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
"I am worried about the ability of Facebook and others to manipulate people's thoughts in politics or other areas" > http://www.bbc.co.uk/news/technology-28051930?ocid=socialflow_twitter …