The Hedera code does not allow freezing of any account, smart contract, HCS topic, file, or token. Not even by a transaction signed by the Council. The code only allows the Council to delete files, but it has never done so, and it does not let them delete accounts or tokens or contracts or topics, or scheduled transactions.
There is a mechanism for someone to mint tokens that they can freeze, but their users can see whether they reserved that ability for themselves, or not.
Also, there is transparency. For anything that the Council CAN do through a transaction, that transaction is visible to the world. It is impossible to hide it so there is very strong transparency.