How many times does the wrong guy get the bad mark??
If you are drinking and driving you are the bad guy regardless. Stay home or get a ride.
If you have an accident...if you have ANY alcohol in your system, it will be blamed on the alcohol....not the fight you were having with your wife....or a sneeze...or the other guy...
Here’s a good conservative source of info. http://www.motorists.org/dui/myths