If you decide you don't want to sell your services to users in a particular country, for any reason at all, you can take care of it in the Merchant Portal.
Go to the My Websites menu and select Country Block. Pick one or more of your websites (or select all sites), then pick the country(ies) you want to restrict. Anyone from those blocked countries who attempts to buy on the site(s) you selected will be declined.
So, if a country enacts some new regulation you are not comfortable with, or if you've had a history of bad traffic, or for whatever reason you may want to block a country, now you can easily do it (and un-do it) with just a few clicks in the Merchant Portal.
Learn more about how to block countries.