[hamburgerwah]

This doesn't even sound like a hack. The beneficiaries executed the digital contract in way that was explicitly permissible by the contract. It was perhaps contrary to the original intent of the contracts creator but that intent needs to be irrelevant for digital contracts to serve any useful purpose more than just traditional non-digital contracts.

[patrickthebold]

I agree, I'm not a lawyer but it's not clear to me what laws the hacker broke.