Edicted, unlike the private blockchain where if SE ever decided to remove any tokens through a database change where it could be done privately that's not the case here. Every change that's ever made on the Steem Smart Contract Node is public because all the data is pubic. It's all verifiable. In the meantime decentralized data will have to suffice until the second P2P layer is complete for the Smart Contract Platform nodes.

I can't say for certain we'll never have an ETH/ETH classic case, but even if we did the whole thing is on chain. All the data is there for anyone who seeks to use public data as they see fit. You would still have the choice to view the data and take whatever steps you deem appropriate.