[toast0]

> On the other hand, a mandatory breathalyzer for ignition would be useful to prevent a lone driver from driving drunk. We already have them for people with DUIs, so we should make them mandatory for all cars.

I don't drink often, and I have never and would never drink and drive, but please no. Mandatory breathalyzers for everyone is an immense expense and a huge inconvenience and I suspect would be easily bypassed by those who choose to drink and drive. And I don't want to live with the consequences of making it hard to bypass such a device, because it likely makes working on a vehicle nearly impossible.