So what point does someone become "impaired"? .05? How impaired is a person at .05? ...it will vary between people.

At what age does a driver's natural reaction time become impaired? 70? 65? 60? ...maybe 55? Might be a lot more not-so-elderly drivers out there with reaction times more impaired than an individual at .05. We need a law making these not-so-elderly drivers give up their license. ...not....

I've no use for drunk driving but I've less use for more laws!