You can report these comments for spam. Here's how: https://goo.gl/fWNUpK . You can also block such contacts on YouTube and they won't be able to see or comment on the content you've posted: https://goo.gl/5qtMzL . Hope this helps.
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
You can report these comments for spam. Here's how: https://goo.gl/fWNUpK . You can also block such contacts on YouTube and they won't be able to see or comment on the content you've posted: https://goo.gl/5qtMzL . Hope this helps.