I think it will only take a few on the road to teach motorists what legal driving looks like. Hopefully it'll have a traffic calming effect in general.
Right. I rarely drive and actually try to obey the law when I do so, but where I live (Chicago), obeying the law is a recipe for angering other drivers. Things like obeying the speed limit or stopping for pedestrians in crosswalks delay other drivers, who are quick to express their anger. In a few years, maybe they'll just think I'm in a robot car!