I only give up the right of way in heavy traffic. If someone is trying to enter a highway, but there is a traffic is packed too tightly for an opening, then I believe in proper merging. Meaning in car in the lane goes forward, then a car can enter the highway, then a car in the lane goes forward.
Otherwise, I never give up the right of way. I think it is foolish and can cause accidents. The easier it is for people to predict what you are going to do, the safer things are going to be. Cause they certainly don't take precautions as it is. Pluse it wastes time.