Around the update 4.30 people have been getting console bans for hacking and exploiting.
When 4.30 was released, the T&S (Terms and Service) was updated stating that if you hack or exploit the PS3 you can get console banned. When you accept the T&S is when you update to 4.30 which 3.55 consoles didn't do. If 3.55 never accepted the T&S then that means that Sony has no right to console ban people. Also when you sign in with a spoofer, it clearly states that you are accepting the Privacy Policy, not T&S. If this is a potential loop hole, contact Sony support and demand a un-ban.