My dad was a drunk, so I certainly understand what you went through. And I agree that drunks are unlikely to be motivated by a license plate. However, the drivers around him would be warned of his potential threat, and cops would have a better chance of keeping him off the road, possibly saving someone's life.
So I think this legislation is actually useful. But if you disagree, I'm very willing to hear your reasoning.
How, precisely, are they gonna be able to do that? You gonna have a state trooper stakeout the DUI squared person in the driveway?
Be specific. Discuss how this plan would be implemented (what laws need to be passed, what are the likely manpower requirements). Be sure to estimate the cost.
And what if the car is used by the DUI offender and his wife adding two children above 16 with a driver´s license?