Covering your ass on a blockchain hack while maintaining blockchain integrity.

I had an idea to minimize losses if there was ever an exploit or a hack on the blockchain without seizing the hackers tokens. If 1 million of said token were hacked out of a possible 21 million that would be pretty terrible. almost 5% of total tokens in the hands of a very bad entity. Some people claim that blockchains should be immutable and even if a person acquires tokens in a Bernie way that they should be able to keep them. Here is a way to maintain their tokens while not allowing them to profit. You can do a coinswap and give all the legit holders 1,000 times or more of their previous holdings while not airdropping the scammer. This would allow the culprit to keep their tokens while not being able to gain a lot of value from them and everybody is happy but the thief.