Are any of these hacks actually illegal? Genuine question, as I have not been able to find references to DeFi hackers that have been chased by law enforcement.

Are any of these hacks actually illegal? Genuine question, as I have not been able to find references to DeFi hackers that have been chased by law enforcement. IANAL, but if they are illegal, then it suggests that smart contracts are just to be viewed as automatations of some underlying contract which is subject to legal interpretation. But if such a legal contract does not exist prior to the deployment of the smart contract, then how will one determine which uses of the smart contract are legal, and which that are not? Even the hacks are just making the smart contracts do things that they were programmed to, although PROBABLY unintended.