Smashing parking meters in some "clever" attempt to evade the contract already doesn't bode well for other contracts. Once you've gone that far down the rabbit hole, the contract already means nothing.

Obviously in the real world it is unlikely that the people would think that the above is a good idea, but if they did then the contract is only as worth as much as the paper it is written on. It can simply be ignored. It is not like there is some kind of supernatural power that enforces contracts.