The best incarnation of online Road Rage IMO is in Burnout 3: Takedown. It had all the right ingredients, and the takedown physics were spot on. I loved nothing more then being on the Blue team in my Super Assassin, running as fast as I can away from a horde of Red Euro Circuit Racers.
In Paradise, it's not quite the same.
Instead of all racers starting in the same place, we all start wherever we are on the map.
Instead of the blue team earning boost and the red team having infinite boost, the blue team has not boost at all.