Doesn't bother me a bit... Hop on and enjoy the draft. Its great when you let me know you are there, it allows me to call out road hazards. But if you want to ride in silence and not get and warnings its up to you. I do not get the "personal space" argument as I am on a public road and they are not bothering me one bit by being back there. As to them touching a wheel and taking me down? Please. How often does that happen. I have only rarely seen it and those were at time we had a large paceline rocketing down the road.