Random3683 Hi. Sorry for the trouble registering. It is, unfortunately, necessary. Up until recently, this forum was getting a lot of spam posted to it, creating a lot of trouble for the moderation team.
In short, the server hosting this site has a static list of IP addresses that have been flagged as being used by spammers by other forums. It is common for spammers to use VPNs. Many people have reported that they've had success registering after switching servers, so it is possible to register via a VPN, it just might take a few tries.
I just want to make this very clear: the IP blocks are to reduce spam. If it weren't for the spam, we would go back to the way it used to be, which was to allow registrations from any IP address.