No opting out of Facebook turning your check-ins, likes into ads http://arst.ch/o0j via @arstechnica
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
No opting out of Facebook turning your check-ins, likes into ads http://arst.ch/o0j via @arstechnica