We do take their licences. Generally what the research shows is that about 75% of people who don't have a licence continue to drive anyway. I think that means we need to take measures to ensure that if we take their licence and they keep driving, then we need to put an interlock in their car. Then they can't drive.
The BAC set point for an interlock is about 0.02. We know that when interlocks are installed on the vehicle, they reduce recidivism by 50% to 90%. So I think there's a very good solution right there.