I’m not so sure this is a good idea.

Sure, I’ve wished for a way to convey my road rage in a more techie manner before, but this might be taking it a bit far.

In a nutshell, the Drivemocion is a LED display you can stick on the back of your car.  Using a remote, convey your emotions to the driver behind you.  Choose from a smiley, a frown, a stern “back off!” and a rather hostilely extended middle finger.

Of course you can always just roll down your window and hurl invectives, but that wouldn’t be so geeky now would it?