I don't really understand a lot of peoples view points here.
If I see someone in fronts brake lights go on, the very least I'm going to be doing is moving from accelerator to covering brake pedal.
Unless they have a car with brake lights that display differently based on the degree of braking (which I wouldn't even know how to read if they did) all I know is they're braking.
I don't know if its light breaking or if they've just slammed on the anchors for some reason.
If its anything more than a flicker of the brake light then I'm going to also apply my brakes as if I do nothing and they *are* braking hard then I'm going to be in the back of them before I can re-evaluate, react / reach a stop.
And at 70+ mph on the motorway you'd need to have a very good gap between you and the car in front to cover reaction times in that scenario.
Maybe that makes me part of the problem? or a poor driver? but to me if someone in front of you start braking you need to read ahead and also apply caution.
This is a seperate issue than someone randomly braking on the motorway for no reason but I'm not sure thats what actually happens. I'm sure the 'ground zero' braker (tm) does it for a good reason.
Now waiting for the demands that I should turn in my license
Kev