This seems trivial to bypass. The goal for deceiving banned users is to discourage them from creating new accounts. But I'm sure eventually, the system will be

This seems trivial to bypass. The goal for deceiving banned users is to discourage them from creating new accounts. But I'm sure eventually, the system will be exposed, like if a shadowbanned user is friends with non-banned user and they notice discrepancies. After that, people will just regularly create new accounts to see if the new account can interact with the old one, to see if the old one has been banned