I usually let people filter in front of me if I don't have the
need to jam brake to do that. Of course their signal must be on,
else it is either high-beam (far) or horn (near) from me.
However, those who after seeing the "on" signal, still continue in
the path like never see it, or worse speed up to close in the gap
between the cars, then the driving style might be in question.
Saying this just in case you might be one such driver.
