Obviously I have a bike and car and as a biker have to give the little wave or nod of the head to other bikers. That can get tiring when a group is coming at you. Obviously you can't do that in a car, but I've never seen anyone on a bike get road raged at another biker.
Just a few moments ago..coming home..a car was right across the road and I had the green light. I stopped and gave him a so-so friendly wave to back up as I had to stop. Well, the guy gave me the finger and stayed there and I lossed it. The bunch of guys in the car started swearing at me and from somewhere behind me these half dozen guys on bikes all stopped and started dismounting their bikes. Well, I didn't know a car could reverse that fast and go the other direction until now.
One thing I've mentioned before though is that I've never had a run in with anyone in a Toyota. Again.it must be the commrandity or however you spell it.