If any one, drunk or not, veered into my path, I would swerve to avoid them, not freeze like a rabbit in headlights. I doubt if the police would even check my headlights in that situation, common sense tells me they would be more interested in getting the drunk prosecuted.
But hey if you want to live your life by the rules, I have no problem with that, it's fine. I am very much a law abiding citizen myself in general, but I don't preach to others who already know the rules and decide not to obey them.