Some states have lowered the DUI level so low that one glass of wine at dinner could make a person guilty.
That's a misinterpretation of DUI laws. Even when the legal limit was .10, it was still possible to be found guilty of DUI if the state could prove impairment. In general, no one under the limit would be charged because the state would have to prove that the driver was truly impaired, rather than present a blood test.
The legal limit is simply a level where impairment is legally presumed.
One class of wine would leave a 100lb woman with a BAC of about .04.
In Washington D.C., ANY detectable level of blood alcohol will get you arrested for DUI!
Here in MA a state Rep who also happens to be a defense Atty
has actually proposed lowering the limit to .02 recently.
That sure would be good for his business!