I have had the opposite happen. Years ago (23?) I was flying a 2 meter slope glider near Prescott, AZ. At this particular spot, there was quite often a Red-Tailed Hawk using the slope lift to get a free ride and hunt. I thought this was cool, and at times it looked like we were flying in formation. One day, the hawk decided that I was a threat and attacked me! He came in from above in that crooked-wing dive that you see and struck the top of my wing with his talons. Since he didn't take me out, I guess he decided to let me use the hill from then on because it never happened again. I don't remember if there was any damage.