I think it's universal behavior. Driving at speed limits gets you angry looks, below speed limit and people wanna hurt you. All that so they can reach the red light earlier.
I wonder how well the self driving car copes with these.
In fact, I wonder how well the self driving car copes with an overly aggressive driver cutting in front and slamming on their brakes just to piss you off. I guess it would handle that better than my mothers elderly neighbour who recently didn't manage to brake in time and hit the twerp, writing off her vehicle in the process. Of course, it was counted as her fault since she struck the car in front..
You really think Google can't afford a Death Ray in each car?
I guess it depends on officer mood and how long the car was safely in your lane before the breaking. Mostly officer mood.
Still, there are lots of completely legal sudden braking activities that would cause a collision over 10% of the time. People don't actually drive totally defensively all the time.