As someone who has drunk an awful lot of booze I think I should say something here.

0.05 BAC is not the problem.  Many people are idiots even when they're sober and shouldn't be driving even without drinking a drop. It's only by sheer luck that they don't kill anyone every time they get behind the wheel.

I have a relative who I refuse to get into a car with even when he's sober because he has absolutely no regard for traffic laws. He runs red lights, he ignores yield signs and he constantly cuts people off. 

Imagine if he had a few drinks and got behind the wheel.

Not so CSB: A few years ago I took the keys from a friend as we were leaving a bar.  He was wasted.  I was probably at 0.05. As I was driving he told me to run a red light.   

I refused to run the red light despite him urging me to do so.   

About a month later he was driving alone and he did run a red light - He served a year in prison for that.  The fact is he is a terrible driver and takes unreasonable risks.