If you pay evil fee you can have access to your forum account you create without using VPN, but for you to use a VPN that means you are ignoring paying evil free, so the problem is that you have not watched well or read the instructions carefully, you would have noticed that you are meant to pay some certain fees before you could allow to have access to the forum

Secondly, their's no country that's restricted from not registering in bitcointalk forum, except that you don't wants to pay the evil fee as I said above.