I haven't felt endangered on a green or even yellow light by motorists who have previously waited behind me at a red light. They may feel frustrated that I can't always accelerate as fast as the car in front of me if we are queued a long way back, but I'm pretty confident that they aren't going to hit me. I get in the center of the lane when waiting at the red light, and I stay in the center of the line of traffic until we get across the intersection. I haven't been passed in the middle of an intersection by same-lane traffic since I started doing this.