Frankly, I think you would more about the other driver's ethics. A little consideration goes along way. The guy was a jerk. Crossing the double yellow in California to pass is illegal, but a few drivers will actually move over so you don't have to cross it. I'm sure there are a few that will make things tough. They're from the midwest!
In California, splitting lanes is legal, but there are a few jackasses out there that they should control the whole roadway. I think they must be from the midwest. on one of my Oklahoma trips, I was splitting lanes up to an intersection, which really isn't legal, but what's it hurting. Some other jackass was screaming and honking at me like I was mauling his kid! With the number of those Okies that run stop signs and pull out of parking lots in front of you, even when you're in a cage, I don't think they were ever taught anything about driver courtesy.
Bare