The latest tool in the box. After the rear-window banner, a
hit from the YB, and the thumb out the window, they still don't
get it and eventually start to pass, and on the way by are
likely wondering who is this a-hole and what's the deal with
him, anyways? Well, instead of getting someone they can
exchange stink-eye with, they can now get their answer:
.

.
and I obviously can't see their roadrage either [but still
keep an eye on the nose of their FSP just in case]. Works
out the right-side window for the offramp-crowders, too.
.
It's a simple piece of backing coroplast with a coat hanger
handle run up a couple of the holes and taped into place.
Since I was big-printing stuff for the car for
Mem Day
anyway, this naturally fell out of the process. I'm thinking
of doing up "PUT THAT DOWN and DRIVE" for the other side,
where "that" can apply to whatever shiny distraction is
keeping their brain off the road at the time.
.
Being able to pass an actual coherent, directed and intentional
message that can't be ignored as soon as it's read probably
gives a tangible advantage, where waving various limbs and
digits is too ambiguous. And no blinkie-LED toys needed.
.
_H*