If I block some countries how can I then test that those countries are really block? Is there any other way then ask all people on DP to test? Yes I know they can use a proxy but that’s not the point here.
well you must buy some VPNs , IPs that belong to that countries for example ,for my own proxy promotion service on addvertise.info i have a network of these IPs from different countries + some schools in US to check proxies through ,...
I use a VPN service anonymitynetwork.com, for testing my ad server geo targeting. It currently provide IP from US, UK and Netherland only. What I am saying is the method should be same for your cause too. Try to get VPN connection for those countries. Another way is more of a social engineering type.. make online friends from other countries and ask them to cooperate in your experiments.