I knew trying to register through the TOR network would result in users paying evil fees but what do you mean by shadowban!? I haven't came across this specific term in any of the topics I have engaged before!
Shadow ban doesn't exist on Bitcointalk, usually shadow ban applies for social media accounts where your posts won't be visible to anyone else, while you won't find anything different from your view. He must be talking about the evil fee or assume there is a shadow ban on bitcointalk too.
Here we have temp and permanent ban, and for specific users there is a signature ban but the posts are not censored in anyway unless the user themselves decides to ignore the profile.