I haven't said they weren't. Again, I have taken issue with your statements since they have been inaccurate.
No they werent. Nice try
So, anyway. Now that we edumacated Gerry on that issue, let's get back to the main point. Given that age, alcohol, sleep deprivation and a number of other things can cause impairment, it still comes down to whether or not that level of impairment is a hazard on the road.
As I've said previously, there is no disputing that seniors driving abilities are impaired however, they have a lower accident rate so clearly...and I do mean CLEARLY...there is no simple connection or correlation between impairment and hazard. As the study I read years ago indicated, the hazard level drops as BAC rises to 0.10 then increases significantly. It would be interesting to see some data on shifworkers to see if they are involved in a higher rate of accidents.
In any event, we shouldn't be sanctioning anybody that isn't hurting any other individuals and it appears that is what we are doing with our current drunk driving laws