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
With respect to open source projects, this may involve claiming the ownership of contributions made by other people (not involved with the company at all) as well, does it? Is this really possible?
They don't claim ownership over whole projects, or over things you did in your last. They just claim ownership over any work *you* do while employed.
