Ok, THERE is some concrete advice.https://twitter.com/thenerddess/status/796298359388577792 …
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
The replies/mentions suggest an efficient way to generate twitter blocklists: mining replies to stuff like this that goes viral.