Sounds a bit dodgy to me. I know if something runs out infront of me, be it a bird (well fly lol) cat or dog, its just a natural reaction to hit the brakes. Even though i hate cats with a passion! haha.
I fail to see why it should be dangerous driving if your trying to avoid hitting something.
Usually when a car is hit from behind its a clear cut who is at fault.. (the person that hit the back of the other car). Everyone ive known to be hit from the rear have not been at fault. My mum was one of them, who hit the brakes due to lights changing, a person then rear ended her car... the person that rear ended her had to pay (well her insurance company anyway).
Don't get me wrong, im not arguing with you... i can see your point on how it could be dangerous driving, especially if you did it on purpose. I just think the person behind you should been at a distance far enough to brake/avoid you if anything should go wrong. It should go for coppers as well.
As you probably can guess... i hate tailgaters!!!! F*ckers!