I've often thought about getting a pixelboard sign for the back window of my car, so I could flash messages to other drivers.
At least the first time.
Things like, "Lights on please!"
Or, "Your turn signal is on!"
Or, "There's no fog today!"
For tailgaters, I might have a series:
1. "Do you really need to read my licence plate frame?"
2. "If I'm such a idiot driver, why are you so close to me?
3. "Brake Test Begins in three, two, one..."
But this Coors beer transport truck has a more lighthearted way of suggesting that you leave some distance.
Don't worry - the photo was taken by my passenger...