You've touched on a number of complex issues here IMHO. The one that is a no-brainer for me is lane-splitting. I was splitting traffic in 1975 at 15 in So. Cal. It is natural for me to do this and must be resisted the 99% of the time I'm not in Cal these days. Is this a topic Motorcyclists can unite on? Are there any Riders that would have a problem with another Rider splitting traffic if it was "legal" (plenty of Cop wannabes out there I know).