I know several personal examples of people who I invited to join bitcointalk forum and they couldn't registered because they got evil fee notification and asked to pay with Bitcoin.
Keep in mind that they never before heard about bitcointalk forum, they never registered in this forum, and they don't own any Bitcoin for paying this evil fee :/
I even tested and confirmed this myself from different location, using different device, maybe because some networks are using shared IP addresses.
In the process of punishing spammers and banned users we are also punishing innocent newbies and that is a fact.