Should people be forced to have to try everything to prevent a drunk person from climbing into the driver's seat of his or her car?

Usually there are no problems with drunk people if they don’t get aggressive (some drunks do). And there’s no trouble if they make it to the john in time before ruining your carpet. The serious trouble starts when they climb into the driver’s seat of a car. In Germany there’s now a law that can get you punished, if you knowingly have allowed a drunk person to drive and tried nothing to prevent it. You are required to literally take away the keys and call a cab for the drunk person or find some other means to get him or her home safely. What do you think about this? Would you be in favor of such a law? I think there are pros and cons.