In this case, I think the mistake is one Eric Musselman will never repeat. I think he'll learn from it. I have been guilty of drinking and driving because, for the most part, it was looked at as "no big deal." (This was over 25 years ago...) I look back now and thank everything I believe in that I didn't kill myself or kill or maim innocent bystanders. I think, having done the very thing I feel so strongly about now, I can understand how a person can make an error in judgment.
I think KMG23 said it best in one of the threads when she said: "Once is a mistake. Twice is a pattern."
There are lessons to be learned here that I hope actually benefit someone in the long run.
And, in the long run, maybe high-profile incidents like this will make it more obvious that we need to make better use of existing technology. If you keep the impaired driver from being able to start or drive his/her car, you put an immediate stop to DUI-fatality accidents.