Happy driving

I must admit, I hadn't thought of this aspect of driverless cars before (I had only thought of the icky problem of people having sex in driverless cabs):

I wonder if the problems of bad behaviour in driverless taxis will mean that driverless cars remain mainly a privately owned thing, in which case, if there is to be some emergency override, would it still remain an offence to be drunk while in the potential driver seat?