Just like the Arizona law I cited restricting use of smart contracts for "fire arm tracking", the law could restrict smart contracts in all sorts of ways to protect the public. Examples:
-drafters of smart contracts must be licensed and bonded/insured
-parties to smart contracts must purchase insurance to coverage sufficient to cover losses in full
-criminal liability when marketing materials are inconsistent with the smart contract itself (see: DAO)
-just like many contracts, deeds, trusts must/can be filed with the state...the states could require the same of smart contracts
Now I understand such laws undermine the purpose/intent of many smart contract opponents, but my point is judges/legislature are not powerless insofar as the laws of nature.