Yup. Our cars don't have auto-braking, but the "Pre-Collision Warning" or "Collision Alert" in the Ford Ranger and Mazda MX5 are both very annoying. They create enough of a distraction that I'm concerned that it could lead me into an accident. Yet it triggers too late to do anything about it, unless I simply train myself to reflexively hard brake whenever it goes off, which would almost surely get me rear-ended, especially since it's always a false alarm.
They both mis-trigger fairly reliably if I'm in a bend in the road and there is a car or object on the outside of the bend, so it seems that they don't take into consideration that I've turned the wheel, or the steering angle. I've also had total mystery alerts, seemingly from spots or a shovelfull of dirt on the road surface.
OTOH, the distance-keeping cruise control on the Mazda is very good, and I've used it for dozens of miles at a time on country roads, with and without traffic.
These emergency auto-braking systems are clearly not ready for prime-time, except maybe for highway use, which is where they can do the most good anyway. I sure as heck don't want my car to auto-brake in any of the situations I've seen the "Collision alert" triggered. Some would have definitely caused accidents.